Вопрос по английскому языку:

Chose the righ word.
1)Look! I ve bought he books. Shall I give (their,them) to you?
2)Pete, I m talking to (you, your).keyes?
3)Ann s little cousin is playing the piano.She can play (it,its) well.
4)Do you see the boy near the blackboard?Do you know (him,his)?- I do. But I dont remember (him, his) name.
5) I m not sure it is (their, them) prioblem.
6)This is my dog Rex. ( it,its) tail is blake-and-white.