For Matrices and Magic Squares consider

$A=\left[\begin{array}{ccc}1& 2& 3\\ 1& 4& 9\\ 1& 8& 27\end{array}\right]$

$B=\left[\begin{array}{ccc}1& 1& 1\\ 2& 4& 8\\ 3& 9& 27\end{array}\right]$ then read and do:

Find the matrix multiplication: $D=A^{**}B$

Result:

Find $A^2$

Result:

Find $d=$det$(A)$

Result:

Find the reduced row echelon form of $C$

Result:

Find the inverse of $A$:inv$(A)$

Result:

Find the eigenvalues of $A$:eig$(A)$ Result:

Find the characteristic polynomial of A: poly$(A)$

Result: $$

Find the element by element multiplication: $E=A.**B$

Result:

Find the element by element division: $F=A\frac{.}{B}$

Result:

Find the element by element power: $G=A{*}^{{?}^{?}}2$

Result:

Find mean $(A),$ and the standard deviation $std(A)$

Result:

How do you assign zero values to all elements on rows $1$

and $2$ and columns $1$ and $2$