Given that $G$ is a $76$ matrix and $H$ is a $67$ matrix.

$($a$)$ Is $GH$ defined? If so$,$ what is the order of $GH?$

$($b$)$ Is $HG$ defined? If so$,$ what is the order of $HG?$

Part: $0/2$

Part $1$ of $2$

$\backslash$table$[[$Is $GH$ defined?,Yes$],[$If so$,$ what is the order of $GH?,$