Begin a new script and start a new code cell for Part a$)$ by using $\%\%.$ Use rand$()$ to create an $87$ matrix $A$ of random numbers in the range $0,1.$ The following steps introduce some basic array

indexing and logic structures used in MATLAB Scripts

$($i$)$ In one line of code, change all the values in rows $3$ and $6$ of $A$ to the number $2.$

$($ii$)$ Next, use one line of code to change columns $2$ through $5$ of $A$ to $3.$

$($iii$)$ Next, use one line of code to change elements of A that are in an odd numbered

row and in an even numbered columns to $0\mathrm{.}5($i$.$e$.A(1,2),A(1,4),A(3,6)...)$

$($iv$)$ Finally, use for loops and if statements to change all elements in A that are less

than $0\mathrm{.}5$ to zero.