IN MATLAB

Write a function to accept a matrix $m$ and a number flag, trim and return a matrix as in the following

examples. If $m$ is a square matrix, return $m$ as is$.$ If $m$ is not itself square: then return the top square or

the left square when flag $0$; or return the bottom square or the right square when flag Examples:

Input $m=$

and flag$=1,$ would return:

$9,10,3$

$10,7,6$

$2110($flag$>=0,$ left square, trim off the remaining part$).$

Input same $m$ as above but flag$=-1$ would return:

$3,10,10$

$6,2,5$

$10109($as flag not $0,$ right square$).$

Input $m=$

$1,10,13$

$9,9,13$

$8,13,4$

$15,14,3$

$16,15,10$

$4,6,19$

and flag$=-1$ would return:

$15,14,3$

$16,15,10$

$4619($bottom square as flag not $0).$

Hints: might need some careful algebra on the row number and column number.

THIS MUST BE DONE IN MATLAB