Finding solutions of linear systems a) Write a code taking as input a matrix A of size m n and a vector b of size m1, where m and n are arbitrarily large numbers and m < n, constructing the augmented matrix and performing REF, and RREF without using any built-in functions. In case you encounter any divi[1]sion by 0, you can choose a different A and/or b. Deliverables: The code snippet showing the procedure for REF and RREF.