matlab For example, consider the following function, which computes the sum of all positive elements of a matrix:

$))>((0$

end

Here, $A>0$ creates a logical matrix of the same shape as $A,$ in which elements greater than zero turn into true, and those less than zero turn into false. $)>(0$ produces an array of all the positive elements in $A,$ and the built$-$in function sum computes their sum.

$($a$)$ Write a function named problem $2$a that takes in two arrays A and $B$ as input, and returns one output: the sum $($collectively$)$ of all prime elements in A and all odd elements in B$.($hint: look up the function isprime$)$

$($b$)$ Write a function named problem $2b$ that takes in one array A as input, and returns a modified version of A where all positive elements have boen replacid by their square root.