Sit IN/AT the back of a car?
When talking about sitting in a car do we say:
1) Do you want to sit IN/AT the back?
2) I want to sit IN/AT the front?

Question

Answer

1) Do you want to sit in the back?
2) I want to sit in the front.

Answer

If the car has two sets of seats, we can say "in the back/front (seat)" or "in back/up front". If the car has a middle seat, we can also say "in the middle (seat)", but we do not say "in middle".

Answer

1) Do you want to sit in the back?
2) I want to sit in the front.