$($Matlab$)($a$)$ Use $a=$rand$(10)$ to create three $1010$ matrices of random entries, name $A,C$ and $D.$

$($b$)$ Set up a column vector $b$ by using the array $b=$rand$(1,10).$ Solve the system $Ax=B$ by using two different Matlab methods.

$($c$)$ Find $(AC{)}^{-1}$ if exists