Question

http://prntscr.com/icy9an
Another Spanish question lol

Answer 1

lol
it's right

Answer 2

I would say "había empezado"
I assume it would have started earlier

Answer 3

hm.. yeah that's kind of confusing, like it could be saying that it has begun this week or it had begun this week, depending on the context. but I think it would be ha empezado because in the question (before the part I screenshotted) it said to be in present perfect.

Answer 4

Eh still not very sure but if you feel it is right then go with your gut