2 x 6

(a)  

4 x 12

(a)  

12 x 1

(a)  

7 x 2

(a)  

12 x 5

(a)  

5 x 7

(a)  

1 x 1

(a)  

5 x 9

(a)  

4 x 9

(a)  

9 x 2

(a)  

0 x 2

(a)  

8 x 4

(a)  

11 x 2

(a)  

11 x 4

(a)  

5 x 5

(a)  

11 x 3

(a)  

3 x 2

(a)  

5 x 2

(a)  

8 x 5

(a)