Помогите пожалуйста с заданиями

1.
1) Who studies mathematics in his room?
2) What does the boy study in his room?
3) Where does the boy study mathematics?
4) Does the boy study mathematics in his room?

2.
Do they know almost all the answers?
Must we buy these new books?
Do children eat four or five times a day?
Do our girls dress well?
Is the wind cool?
Do they grow apples and vegetables?
Do they also like this place?