Show me MATLAB code please!

2. (Coding) In HW3, the Gaussian elimination method and the backward substitution has been applied to solve the linear system Az = 5, where Li 2 -10 4 11 2 5 1 1 2 2 | -1 3 7 0 3 1 1 1 -2 9 0 2 and 6= -2 0 1 3 10 0 | 1 1 2 -1 0 20 following step (a) and (b) below. (a) Revise your code in HW3 properly to obtain the LU decomposition of the matrix A (you need to define a new matrix to store the elements in L). (b) Apply forward substitution to solve Lyb. (c) Apply backward substitution to solve Ur = (Compare the solution you obtain with the one obtained in HW3). Submit the code for Problem 2 in the appendix