Write a MATLAB function: input: n x m matrix (A) output: matrix in Row Echelon Form

---ROW ECHELON FORM--- (NOT REDUCED row echelon form)

*******************(can not use RREF function)*************************

*will thumbs down if RREF function is used, am looking for NOT reduced version*

use loops, etc. to perform by using row swaps and row replacements where necessary to make the function output the matrix in *row echelon form*