2 No, it isn't. It is under the desk.
3 No, they aren't. They are in the pencil case.
4 No, they aren't. They are under chair.
5 No, it isn't. It is on the chair.
6 No, it isn't. It is in the bag.
b)
3 The sandwiches are on the magazines.
4 The camera is on the desk.
5 The chair is on the floor.