The Sizes of Two Matrices a and B Are Given $A$

Multiple Choice

The sizes of two matrices A and B are given. Find the sizes of the product AB and the product BA, whenever these
products exist.
- $A$ is $2 \times 2$ , and $B$ is $2 \times 2$ .

A) $4 \times 2 ; 4 \times 2$
B) $2 \times 2 ; 2 \times 2$
C) $2 \times 4 ; 2 \times 4$
D) $1 \times 1 ; 1 \times 1$