Вопросы с хвостиком. 1.we are going to visit our granny. 2.they are going to play football on the play round. 3.my sister is going to go her homework at the weekend.

1.We are going to visit our granny,arent we
2.They are going to play football on the play round,arent they 
3.My sister is going to do her homework at the weekend,isnt she

1) aren't we
2)aren't they
3)isn't she