Data Analysis and Statistics using (Python or R ) Language - Bruxelles - Cours particulier

Donner des Cours

Data Analysis and Statistics using (Python or R ) Language

Àpd 58.14 C$ /h

Welcome!

I recently completed a Data Science and Artificial Intelligence coding school following the successful completion of my master's degree from the esteemed University of Ghent in Belgium. With over 2 years of experience as a private Python tutor, I am well-equipped to assist you.

My mission is to help you with statistics and data analysis for your projects. My courses are designed to cater to a diverse range of students, including teenagers, those in higher education or pursuing doctoral studies in sciences, as well as anyone interested in understanding statistics. I offer a flexible teaching approach that can be tailored to your specific needs.

To ensure an effective learning experience, I kindly request a brief description of your objectives for the course. This will enable me to customize the content and adapt my teaching methods accordingly. Based on your requirements, my courses can cover the following topics:

- Fundamental principles of descriptive and inferential statistics.
- Various inference tests, including commonly used ones such as Chi-square, T-test, ANOVA, and linear regression, as well as more advanced techniques like multi-level analyses, structural equations, and data organization tools such as factor analysis and cluster analysis.
- Practical application using statistical software such as SPSS, R language, and Python.
- Engaging in practical exercises using provided data or your own dataset.
- Regardless of your current level of understanding, I will focus on the specific areas that meet your needs and interests. I am committed to providing clear and comprehensible explanations to ensure your effective comprehension of the concepts.

Informations supplémentaires

Pen and paper at hand; Laptop/Computer required; (With a tablet would be a bonus).

Lieu

|

Utilisez Ctrl + molette pour zoomer !

Cours au domicile de l'élève :

Autour de Bruxelles, Belgique

Cours chez le professeur :

Rue Vander Elst, Brussels, Belgium

En ligne depuis Belgique

Age

Adolescents (13-17 ans)

Adultes (18-64 ans)

Niveau du Cours

Débutant

Intermédiaire

Avancé

Durée

60 minutes

Enseigné en

anglais

Compétences

Commentaires

Disponibilité semaine type

(GMT -05:00)

New York

Cours chez le professeur et par webcam

Cours à domicile

Mon

Tue

Wed

Thu

Fri

Sat

Sun

00-04

04-08

08-12

12-16

16-20

20-24

From basic statistics (calculating mean, variance ...) to applied statistics in health sciences: Which test to use ?, how to interpret my results? ...
All the basics and prerequisites necessary for a good understanding of the course will be covered.

Trainer for 10 years, I offer to support you in your learning of Photoshop software by working on concrete examples.

My experience as a trainer allowed me to sharpen my teaching techniques. I adapt to the level of the student to help him master the tools offered by this software.

Student with a degree in political science, public administration and management, having taken advanced courses in statistics, in particular univariate and bivariate descriptive statistics (regression line), but also on probabilities, random variables, estimators and hypothesis tests, as well as as well as linear regression and principal component analysis (PCA), gives lessons to students at secondary level and higher at baccalaureate level.
My methodology is based on a reminder of the essential points of the theory seen in class, the establishment of summary sheets, then the realization of exercises with the student to ensure that he understands the material.
Teaching for 3 years of help in mathematics and statistics to students of secondary and higher level. Face to face or small group of maximum 3 people.
The majority having obtained good results during their exams, they recommended me to their friends and acquaintances.

As a teaching professional, I have always enjoyed sharing my knowledge. My goal is to provide quality education. I am aware that some topics may seem complex, but often this is simply the result of an inadequate explanation by the teacher. With me, you will discover a real interest in the material!

We strive together to achieve academic excellence, overcoming the shortcomings and difficulties encountered by your child. Studies will become a pleasant experience for him. In addition to the courses, I can also help with school orientation, identifying their preferences and highlighting the advantages and benefits of a fulfilling educational ambition.

The sessions generally take place according to the following stages:

1️⃣ The first sessions are devoted to the assessment of the student's level in order to detect existing gaps.

2️⃣ Next, we create a personalized plan to address these gaps, including the number of hours of work needed, specific areas to focus on, and appropriate training and development exercises.

3️⃣ We stay in constant contact with the student's class teacher, to keep up to date with the latest requirements and ensure a consistent approach.

4️⃣ Subsequently, I provide exams similar to those that are likely to be asked in class, to prepare the student effectively.

5️⃣ Upon request, I write a regular report, usually monthly, to keep parents informed of their child's progress throughout their course.

I adapt my methodology according to the specific needs of each student, thus offering them a personalized and adapted work approach.

In addition, I offer crash courses for students preparing for the start of the school year, allowing them to start the year well prepared, with a solid lead on the school curriculum.

If you have any questions, do not hesitate to contact me. I will be happy to help you.

I adapt my learning method according to subject and student. Some prefer to understand the whole theory before starting the exercises, others prefer to practice to better understand the theoretical part.
I strongly encourage the student because the state of mind and morale have a direct influence on school results.
I am an understandable person and I always try to take each one in his own way, to give remarks that facilitate the work, to give the tips and tricks necessary to have a good note.
I do exercises and exams corrected.
I always try to do my best to make the student fast able to handle his homework.

This course is for students who have difficulty programming or understanding certain concepts related to computer programming.

Being a final year student in computer science with a lot of experience in different projects, I understand the obstacles encountered by students.
My goal is to make sure that they overcome these difficulties and that they understand the computer logic behind them so that they can solve the problems themselves and progress.

I teach the following languages:
- Python
- Java
-Scala
- C / C ++
- MySql

Specializing in algorithms and data structures, I can also help with algorithmics especially for problematic subjects for beginners (data structures (trees, heaps etc.), recursion)
I am very patient and attentive.

As a Franco-Belgian management teacher, I give Excel lessons with passion!
Whether remotely or face-to-face, I offer many examples and exercises to accompany you.
I travel without problem throughout the region of Brussels and its surroundings, for lessons of at least 2 hours. For France, courses are only given remotely.

Here are some key words that will be covered in my classes:
Scenario analysis, Year, Rounding, Today, Bdnb, Bdnbval, Bdsum, Search, Column, Copy/paste in values, Copy/paste with transposition, Consolidation, Date, Datedif, Determat, Dollar, Right, Righterg, Equiv, Esterror, Estna, Frequency, Filter (simple and advanced), Format of cells, Left, Large.Value, Printing of documents, Index, Indirect, Inversemat, Day, Weekday, Line, Matrix, Max, Maxa, Max.Si, Min , Mina, Mina.If, Formatting of cells and ranges, Month, Average, Average.If, Nb, Nb.If, Nbval, Naming of cells and ranges, No, Small.value, Product, Productmat, Protection of cells, Lookup (Lookup), Lookupv (VLookup), Lookuph (HLookup), If (If), If.Not.Disp, If.Conditions, Iferror, Sum, Sumproduct, Sum.If, Sum.If.Set, Substitute , Pivot tables, Sorting, Cell locking

Do not hesitate to contact me to organize your lessons according to your needs and availability. Together, we will develop your Excel skills in an efficient and personalized way.

(FR/ENGL) Experienced and passionate tutor, I have been supporting students for 6+ years in their mathematics journey, from high school through the beginning of higher education.

🔎 Why choose my lessons?
• Guaranteed progress: my students not only improve their grades, but also gain confidence and independence.
• Personalized teaching: I adapt to each student’s needs (remedial support, exam preparation, advanced learning).
• Engaging and practical lessons: thanks to my degree in Business Engineering (ULB – Solvay School) and my experience as both a high school teacher and a tutor, I enrich my explanations with numerous real-life examples.

🏫 Lesson formats
• At-home tutoring (individual or small group) – available anywhere in Brussels and Wallonia.
• At the teacher’s location – in a classroom near ULB.
• Online or hybrid lessons – interactive and adapted to all profiles using effective digital tools.

💡 My goal: to share not only knowledge, but also a love for learning and solid study methods that will benefit students far beyond the classroom.

Feel free to contact me for any further information; I’ll be happy to help.

Looking forward,
Ryan

Machine learning -supervised unsupervised .. different projects and applications
Professor in mathematics, computer science at HEFF in Brussels and before a professor of electronics at IEPSCF, NGÉNIEUR in electronics ECAMIEN basic graduate in mathematics-physics and I offer an individualized pedagogy, help in the preparation of questions or exams. My goal is to make the student progress without overloading him. I give homework after each lesson and periodically provide progress reports
I strongly encourage the student because the state of mind and morale have a direct influence on school results.
I am someone understandable and I always try to take each in his own way.
I always start by clarifying the course after giving an example then giving an example to the student to do a complete exercise and finally correct an exam together generally that's the methodology but it can change from one case to another.

💻 Learn IT easily with tailor-made support! 🚀
Do you want to improve your computer skills or discover the basics to better navigate the digital world? I offer courses adapted to all levels, whether you are a beginner or looking to improve.
🌟 Why choose me?
• Adapted teaching: I explain concepts in a simple and clear manner, even for novices.
• Personalized courses: Each session is designed according to your needs and objectives.
• Hands-on learning: Immediately apply what you learn.
📘 Areas covered:
• Introduction to computers (using the computer, browsing the internet, security).
• Office software (Word, Excel, PowerPoint).
• Introduction to programming (Python, HTML/CSS).
• Basics of data management and analysis with tools like Power BI.
🕒 Flexible hours: Classes available on weekdays or weekends, depending on your schedule.
📍 Modalities: In person or online, according to your preferences.
👉 Contact me now to start your adventure in the digital world!

Classes are face-to-face at the student's home or via webcam. You will learn computer science according to your level and what you want to learn. I am a computer science student so quite versatile. As far as programming is concerned, the possible languages are: HTML, CSS, PHP, Python, C and C++, for the network, introduction to software such as Cisco packet tracer, GNS3, vmware, virtual box. Introductory computer courses, even rudimentary ones, are possible. You will learn in a jovial and encouraging atmosphere, I have a lot of experience in the field of teaching and I am comfortable with children

As a math and science teacher, I have extensive experience in a school setting, allowing me to monitor student progress over the long term. My teaching method is tailored to all profiles, with the goal of helping each student progress at their own pace. Passionate about teaching, I strive to make concepts accessible and convey the joy of learning.

Hello! My name is Hanae, and I offer personalized lessons in English, Mathematics, and Computer Science for students of all levels — from primary school to university.

With over 10 years of professional experience in the tech and business world, I combine structured methods with a friendly and supportive teaching style to help students gain confidence and achieve their goals.

👩‍💻 In Computer Science, I teach programming basics (C language), digital logic, and software tools such as Power BI, Excel, and SQL.

Whether you want to improve your grades, prepare for exams, or strengthen your practical skills, my lessons are designed to make learning clear, engaging, and motivating.

Lessons can be given online or in person, and I always adapt the pace and content to the student’s needs.

Are you looking for a reliable and experienced Economics teacher to support your child at secondary school level in Belgium? I offer comprehensive and personalised Economics tutoring, fully aligned with the Belgian secondary school curriculum. With solid experience in secondary education, I help student s understand key economic concepts, build confidence, and achieve better academic results, whether for regular follow-up, homework support, or exam preparation.

Topics Covered – Full Secondary Economics Curriculum
• Introduction to Economics
(needs, scarcity, economic agents, decision-making)
• Market Economy and Firms
(supply and demand, price formation, production, competition)
• Money, Banking and Basic Finance
(functions of money, banks, credit, savings, inflation – secondary level)
• Labour Market and Economic Policies
(employment, unemployment, wages, role of the State)
• Household Economics and Consumption
(household budget, purchasing power, responsible consumption)
• Basics of Accounting and Management
(income and expenses, costs, basic financial management)
• Economics and Sustainable Development
• Belgian and European Economy – Key Concepts
• Economic Methodology and Exam Skills
(reading graphs, analysing texts, structuring answers)
• Applied Economics: exercises and case studies

Teaching Approach
✔ Clear and structured explanations
✔ Step-by-step progression
✔ Adapted to the student’s level and learning pace
✔ Practical exercises and real-life examples
✔ Focus on exam techniques and methodology
✔ Supportive and confidence-building environment

Learning Objectives
• Improve understanding of Economics
• Achieve better school results
• Gain confidence and autonomy
• Prepare effectively for exams
• Develop strong analytical and study skills

For Parents
I provide a serious, supportive and structured learning framework.
Regular feedback can be shared with parents regarding the student’s progress and areas for improvement.

Practical Information
• Level: Secondary school (all grades)
• Curriculum: Belgium (FWB)
• Format: Online or in-person
• Language: English or French

Microsoft Office is now a virtually indispensable software suite for almost everyone, whether during our school years, through PowerPoint presentations, document creation with MS Word, calculations and graph creation in MS Excel, or during our professional lives. In the latter case, we need to get even more out of it in a minimum amount of time.

Some may have noticed that it's possible to automate a series of actions by recording "macros" to save time. But have you ever considered that behind these macros lies computer code generated for you in "Visual Basic for Applications" (VBA)? Understanding this type of code and how it manipulates the "object model" associated with the application being used (for example, the worksheets, rows and columns, cells, and the values they contain, in the case of Microsoft Excel) allows you to go further in terms of automation and flexibility.

The course is adaptable to the student and their level. Depending on demand and the number of sessions, it can cover the fundamentals of programming (variables, types, declarations, manipulations, local and global variables, etc.), illustrated using VBA, as well as best programming practices (error handling, using comments, standardizing variable names, code modularity), culminating in the creation of a project enabling interoperability between different Microsoft Office tools (for example, associating notes taken with OneNote with dates in a perpetual calendar created in Excel). It may even cover concepts such as object-oriented programming (polymorphism, encapsulation) and the differences between compiled and interpreted languages.

The sky's the limit :))

From basic statistics (calculating mean, variance ...) to applied statistics in health sciences: Which test to use ?, how to interpret my results? ...
All the basics and prerequisites necessary for a good understanding of the course will be covered.

Trainer for 10 years, I offer to support you in your learning of Photoshop software by working on concrete examples.

My experience as a trainer allowed me to sharpen my teaching techniques. I adapt to the level of the student to help him master the tools offered by this software.

Student with a degree in political science, public administration and management, having taken advanced courses in statistics, in particular univariate and bivariate descriptive statistics (regression line), but also on probabilities, random variables, estimators and hypothesis tests, as well as as well as linear regression and principal component analysis (PCA), gives lessons to students at secondary level and higher at baccalaureate level.
My methodology is based on a reminder of the essential points of the theory seen in class, the establishment of summary sheets, then the realization of exercises with the student to ensure that he understands the material.
Teaching for 3 years of help in mathematics and statistics to students of secondary and higher level. Face to face or small group of maximum 3 people.
The majority having obtained good results during their exams, they recommended me to their friends and acquaintances.

As a teaching professional, I have always enjoyed sharing my knowledge. My goal is to provide quality education. I am aware that some topics may seem complex, but often this is simply the result of an inadequate explanation by the teacher. With me, you will discover a real interest in the material!

We strive together to achieve academic excellence, overcoming the shortcomings and difficulties encountered by your child. Studies will become a pleasant experience for him. In addition to the courses, I can also help with school orientation, identifying their preferences and highlighting the advantages and benefits of a fulfilling educational ambition.

The sessions generally take place according to the following stages:

1️⃣ The first sessions are devoted to the assessment of the student's level in order to detect existing gaps.

2️⃣ Next, we create a personalized plan to address these gaps, including the number of hours of work needed, specific areas to focus on, and appropriate training and development exercises.

3️⃣ We stay in constant contact with the student's class teacher, to keep up to date with the latest requirements and ensure a consistent approach.

4️⃣ Subsequently, I provide exams similar to those that are likely to be asked in class, to prepare the student effectively.

5️⃣ Upon request, I write a regular report, usually monthly, to keep parents informed of their child's progress throughout their course.

I adapt my methodology according to the specific needs of each student, thus offering them a personalized and adapted work approach.

In addition, I offer crash courses for students preparing for the start of the school year, allowing them to start the year well prepared, with a solid lead on the school curriculum.

If you have any questions, do not hesitate to contact me. I will be happy to help you.

I adapt my learning method according to subject and student. Some prefer to understand the whole theory before starting the exercises, others prefer to practice to better understand the theoretical part.
I strongly encourage the student because the state of mind and morale have a direct influence on school results.
I am an understandable person and I always try to take each one in his own way, to give remarks that facilitate the work, to give the tips and tricks necessary to have a good note.
I do exercises and exams corrected.
I always try to do my best to make the student fast able to handle his homework.

This course is for students who have difficulty programming or understanding certain concepts related to computer programming.

Being a final year student in computer science with a lot of experience in different projects, I understand the obstacles encountered by students.
My goal is to make sure that they overcome these difficulties and that they understand the computer logic behind them so that they can solve the problems themselves and progress.

I teach the following languages:
- Python
- Java
-Scala
- C / C ++
- MySql

Specializing in algorithms and data structures, I can also help with algorithmics especially for problematic subjects for beginners (data structures (trees, heaps etc.), recursion)
I am very patient and attentive.

As a Franco-Belgian management teacher, I give Excel lessons with passion!
Whether remotely or face-to-face, I offer many examples and exercises to accompany you.
I travel without problem throughout the region of Brussels and its surroundings, for lessons of at least 2 hours. For France, courses are only given remotely.

Here are some key words that will be covered in my classes:
Scenario analysis, Year, Rounding, Today, Bdnb, Bdnbval, Bdsum, Search, Column, Copy/paste in values, Copy/paste with transposition, Consolidation, Date, Datedif, Determat, Dollar, Right, Righterg, Equiv, Esterror, Estna, Frequency, Filter (simple and advanced), Format of cells, Left, Large.Value, Printing of documents, Index, Indirect, Inversemat, Day, Weekday, Line, Matrix, Max, Maxa, Max.Si, Min , Mina, Mina.If, Formatting of cells and ranges, Month, Average, Average.If, Nb, Nb.If, Nbval, Naming of cells and ranges, No, Small.value, Product, Productmat, Protection of cells, Lookup (Lookup), Lookupv (VLookup), Lookuph (HLookup), If (If), If.Not.Disp, If.Conditions, Iferror, Sum, Sumproduct, Sum.If, Sum.If.Set, Substitute , Pivot tables, Sorting, Cell locking

Do not hesitate to contact me to organize your lessons according to your needs and availability. Together, we will develop your Excel skills in an efficient and personalized way.

(FR/ENGL) Experienced and passionate tutor, I have been supporting students for 6+ years in their mathematics journey, from high school through the beginning of higher education.

🔎 Why choose my lessons?
• Guaranteed progress: my students not only improve their grades, but also gain confidence and independence.
• Personalized teaching: I adapt to each student’s needs (remedial support, exam preparation, advanced learning).
• Engaging and practical lessons: thanks to my degree in Business Engineering (ULB – Solvay School) and my experience as both a high school teacher and a tutor, I enrich my explanations with numerous real-life examples.

🏫 Lesson formats
• At-home tutoring (individual or small group) – available anywhere in Brussels and Wallonia.
• At the teacher’s location – in a classroom near ULB.
• Online or hybrid lessons – interactive and adapted to all profiles using effective digital tools.

💡 My goal: to share not only knowledge, but also a love for learning and solid study methods that will benefit students far beyond the classroom.

Feel free to contact me for any further information; I’ll be happy to help.

Looking forward,
Ryan

Machine learning -supervised unsupervised .. different projects and applications
Professor in mathematics, computer science at HEFF in Brussels and before a professor of electronics at IEPSCF, NGÉNIEUR in electronics ECAMIEN basic graduate in mathematics-physics and I offer an individualized pedagogy, help in the preparation of questions or exams. My goal is to make the student progress without overloading him. I give homework after each lesson and periodically provide progress reports
I strongly encourage the student because the state of mind and morale have a direct influence on school results.
I am someone understandable and I always try to take each in his own way.
I always start by clarifying the course after giving an example then giving an example to the student to do a complete exercise and finally correct an exam together generally that's the methodology but it can change from one case to another.

💻 Learn IT easily with tailor-made support! 🚀
Do you want to improve your computer skills or discover the basics to better navigate the digital world? I offer courses adapted to all levels, whether you are a beginner or looking to improve.
🌟 Why choose me?
• Adapted teaching: I explain concepts in a simple and clear manner, even for novices.
• Personalized courses: Each session is designed according to your needs and objectives.
• Hands-on learning: Immediately apply what you learn.
📘 Areas covered:
• Introduction to computers (using the computer, browsing the internet, security).
• Office software (Word, Excel, PowerPoint).
• Introduction to programming (Python, HTML/CSS).
• Basics of data management and analysis with tools like Power BI.
🕒 Flexible hours: Classes available on weekdays or weekends, depending on your schedule.
📍 Modalities: In person or online, according to your preferences.
👉 Contact me now to start your adventure in the digital world!

Classes are face-to-face at the student's home or via webcam. You will learn computer science according to your level and what you want to learn. I am a computer science student so quite versatile. As far as programming is concerned, the possible languages are: HTML, CSS, PHP, Python, C and C++, for the network, introduction to software such as Cisco packet tracer, GNS3, vmware, virtual box. Introductory computer courses, even rudimentary ones, are possible. You will learn in a jovial and encouraging atmosphere, I have a lot of experience in the field of teaching and I am comfortable with children

As a math and science teacher, I have extensive experience in a school setting, allowing me to monitor student progress over the long term. My teaching method is tailored to all profiles, with the goal of helping each student progress at their own pace. Passionate about teaching, I strive to make concepts accessible and convey the joy of learning.

Hello! My name is Hanae, and I offer personalized lessons in English, Mathematics, and Computer Science for students of all levels — from primary school to university.

With over 10 years of professional experience in the tech and business world, I combine structured methods with a friendly and supportive teaching style to help students gain confidence and achieve their goals.

👩‍💻 In Computer Science, I teach programming basics (C language), digital logic, and software tools such as Power BI, Excel, and SQL.

Whether you want to improve your grades, prepare for exams, or strengthen your practical skills, my lessons are designed to make learning clear, engaging, and motivating.

Lessons can be given online or in person, and I always adapt the pace and content to the student’s needs.

Are you looking for a reliable and experienced Economics teacher to support your child at secondary school level in Belgium? I offer comprehensive and personalised Economics tutoring, fully aligned with the Belgian secondary school curriculum. With solid experience in secondary education, I help student s understand key economic concepts, build confidence, and achieve better academic results, whether for regular follow-up, homework support, or exam preparation.

Topics Covered – Full Secondary Economics Curriculum
• Introduction to Economics
(needs, scarcity, economic agents, decision-making)
• Market Economy and Firms
(supply and demand, price formation, production, competition)
• Money, Banking and Basic Finance
(functions of money, banks, credit, savings, inflation – secondary level)
• Labour Market and Economic Policies
(employment, unemployment, wages, role of the State)
• Household Economics and Consumption
(household budget, purchasing power, responsible consumption)
• Basics of Accounting and Management
(income and expenses, costs, basic financial management)
• Economics and Sustainable Development
• Belgian and European Economy – Key Concepts
• Economic Methodology and Exam Skills
(reading graphs, analysing texts, structuring answers)
• Applied Economics: exercises and case studies

Teaching Approach
✔ Clear and structured explanations
✔ Step-by-step progression
✔ Adapted to the student’s level and learning pace
✔ Practical exercises and real-life examples
✔ Focus on exam techniques and methodology
✔ Supportive and confidence-building environment

Learning Objectives
• Improve understanding of Economics
• Achieve better school results
• Gain confidence and autonomy
• Prepare effectively for exams
• Develop strong analytical and study skills

For Parents
I provide a serious, supportive and structured learning framework.
Regular feedback can be shared with parents regarding the student’s progress and areas for improvement.

Practical Information
• Level: Secondary school (all grades)
• Curriculum: Belgium (FWB)
• Format: Online or in-person
• Language: English or French

Microsoft Office is now a virtually indispensable software suite for almost everyone, whether during our school years, through PowerPoint presentations, document creation with MS Word, calculations and graph creation in MS Excel, or during our professional lives. In the latter case, we need to get even more out of it in a minimum amount of time.

Some may have noticed that it's possible to automate a series of actions by recording "macros" to save time. But have you ever considered that behind these macros lies computer code generated for you in "Visual Basic for Applications" (VBA)? Understanding this type of code and how it manipulates the "object model" associated with the application being used (for example, the worksheets, rows and columns, cells, and the values they contain, in the case of Microsoft Excel) allows you to go further in terms of automation and flexibility.

The course is adaptable to the student and their level. Depending on demand and the number of sessions, it can cover the fundamentals of programming (variables, types, declarations, manipulations, local and global variables, etc.), illustrated using VBA, as well as best programming practices (error handling, using comments, standardizing variable names, code modularity), culminating in the creation of a project enabling interoperability between different Microsoft Office tools (for example, associating notes taken with OneNote with dates in a perpetual calendar created in Excel). It may even cover concepts such as object-oriented programming (polymorphism, encapsulation) and the differences between compiled and interpreted languages.

The sky's the limit :))

Garantie Le-Bon-Prof

Contacter Masud