Problem $4$: Suppose you have two matrices, A and B$,$ and the MATLAB outputs of size$($A$)$ andsize$($B$)$ are $[43]$ and $[32],$ respectively. What is the output of size$($A$*$B$)?$ What is the output of size$($B$*$A$)?$Explain why one results in an error and the other does not.