1 x 1 or $$1^2$$

(a)  

2 x 1

(a)  

3 x 1

(a)  

4 x 1

(a)  

5 x 1

(a)  

6 x 1

(a)  

7 x 1

(a)  

8 x 1

(a)  

9 x 1

(a)  

10 x 1

(a)  

11 x 1

(a)  

12 x 1

(a)  

13 x 1

(a)  

14 x 1

(a)  

15 x 1

(a)  

0 x 2

(a)  

1 x 2

(a)  

2 x 2 or $$2^2$$

(a)  

3 x 2

(a)  

4 x 2

(a)  

5 x 2

(a)  

6 x 2

(a)  

7 x 2

(a)  

8 x 2

(a)  

9 x 2

(a)  

10 x 2

(a)  

11 x 2

(a)  

12 x 2

(a)  

13 x 2

(a)  

14 x 2

(a)  

15 x 2

(a)  

0 x 3

(a)  

1 x 3

(a)  

2 x 3

(a)  

3 x 3 or $$3^2$$

(a)  

4 x 3

(a)  

5 x 3

(a)  

6 x 3

(a)  

7 x 3

(a)  

8 x 3

(a)  

9 x 3

(a)  

10 x 3

(a)  

11 x 3

(a)  

12 x 3

(a)  

13 x 3

(a)  

14 x 3

(a)  

15 x 3

(a)  

0 x 4

(a)  

1 x 4

(a)  

2 x 4

(a)  

3 x 4

(a)  

4 x 4 or $$4^2$$

(a)  

5 x 4

(a)  

6 x 4

(a)  

7 x 4

(a)  

8 x 4

(a)  

9 x 4

(a)  

10 x 4

(a)  

11 x 4

(a)  

12 x 4

(a)  

13 x 4

(a)  

14 x 4

(a)  

15 x 4

(a)  

0 x 5

(a)  

1 x 5

(a)  

2 x 5

(a)  

3 x 5

(a)  

4 x 5

(a)  

5 x 5 or $$5^2$$

(a)  

6 x 5

(a)  

7 x 5

(a)  

8 x 5

(a)  

9 x 5

(a)  

10 x 5

(a)  

11 x 5

(a)  

12 x 5

(a)  

13 x 5

(a)  

14 x 5

(a)  

15 x 5

(a)