Q$5(40\%)$

Write a function $($call it "matrix$\_$fun"$)$ that performs the following tasks:

Takes a matrix as input argument $($the matrix can be of any dimensions, e$.$g$.,11,31$

$34,$ etc.$).$

Using a combination of looping and selection statements, calculates the square root of all non$-$negative element$($s$)$ and the absolute value of all negative element$($s$)$ in the matrix.

Writes the new matrix with changed values from Step $2$ to a $.$dat file $($Hint: use $-$ascii qualifier$).$

Returns the new matrix as output argument.

Examples of calling matrix$\_$fun: