Marina told me that she taught statistics, macro economic and finance. I asked in advance. I showed her an exercise she replies"I don't do group work", even though they were basic exercises. She arrived and could not answer the most basic questions. For example, I asked her what a residual was, she replied "it is in your notes" when I didn't even have notes. She kept saying "I don't do excel" but then couldn't even answer questions about the general concept.We go to another subject, finance. She reads the solutions and did not explain any of them in depth. She says "I only do theory" but if you know theory that well then you should be able to solve an exercise. I do not recommend, a total waste of money and a scam.