Given are a $56$ matrix $A,$ a $36$ matrix $B,$ and a $9-$element vector $v.$

A=[258111417691215187101316195811141720

6912151821]

$6$

$5$

$4$

$6$

$5$

$4$

$3$

$B=\left[\begin{array}{cccccccccccccccc}5& 10& 15& 20& 25& 30& 35& 40& 45& 50& 55& 60& 65& 70& 75& 80\end{array}\right]$

$55$

$30$

$v=\left[\begin{array}{cccc}99& 989796959493& 92& 91\end{array}\right]$

Create the three arrays in the Command Window, and then, by writing one com$-$

mand, replace the last four columns of the first and third rows of A with the first

four columns of the first two rows of $B,$ the last four columns of the fourth row of

A with the elements $5$ through $8$ of $v,$ and the last four columns of the fifth row of

A with columns $3$ through $5$ of the third row of $B.$