Question #$1$

Given the following matrix:

H $=$ randi$([-10,10],5)$

Using only matrix operations. For full credit you must minimize the number of operations.

Create a new matrix $($J$)$ that contains only rows $1,4$ and $5$

Create a new matrix $($K$)$ that contains only columns $1,4$ and $5$

Question #$2$

Using only matrix operations. For full credit you must minimize the number of operations.

Create a $4$x$3$ random matrix A$.$ Do NOT use the randi$()$ function...use rand$().$

Get those elements of A that are in rows $3$ to $4$ and columns $2$ to $3$ and create matrix B from those

elements.

Add a fourth column to A and set it equal to the first column of A$.$

Replace the last $3$x$3$ submatrix of A $($rows $2$ to $4,$ columns $2$ to $4)$ with a $3$x$3$ identity matrix.

Delete the first and third rows of A$.$

Round off all entries of A