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