EX11: 

1 – on

2- in

3- in front of

4- under

5- next

6- behind

7- in

8- next to

EX13:

1-      On

2-       Next to

3-      Behind

4-      Next to

5-      Next to

6-      Next to

7-      On

8-      Under

EX15:

1-      In, in, in

2-      On, in

3-      In, on, on, at, in

4-      On, in

5-      On, on