$8\ x\ 1$  

(a)  

 $12\ x\ 1$  

(a)  

 $1\ x\ 5$  

(a)  

 $1\ x\ 1$  

(a)  

7 x 1

(a)  

10 x 1

(a)  

4 x 1

(a)  

9 x 1

(a)  

1 x 6

(a)  

1 x 12

(a)  

1 x 0

(a)  

1 x 2

(a)  

2 x 1

(a)  

5 x 1

(a)  

1 x 9

(a)  

12 x 1

(a)  

1 x 3

(a)  

0 x 1

(a)  

1 x 4

(a)  

 $12\ x\ 2$  

(a)  

 $5\ x\ 2$  

(a)  

2 x 6

(a)  

4 x 2

(a)  

3 x 2

(a)  

2 x 11

(a)  

2 x 5

(a)  

2 x 2

(a)  

7 x 2

(a)  

2 x 12

(a)  

1 x 2

(a)  

8 x 2

(a)  

10 x 2

(a)  

9 x 2

(a)  

6 x 2

(a)  

0 x 2

(a)  

2 x 10

(a)  

4 x 2

(a)  

0 x 2

(a)  

2 x 8

(a)