2x4=

(a)  

1x4=

(a)  

2x3=

(a)  

2x1=

(a)  

3x4=

(a)  

4x3=

(a)  

1x1=

(a)  

4x1=

(a)  

4x4=

(a)  

1x3

(a)  

3x1=

(a)  

1x2=

(a)  

2x2=

(a)  

3x3=

(a)