I tried the code in matlab, but it would not work. So I'm really confused how to answer the question.

Belo. is the code fr a function felim(A,b) ?Jebm stand for forward r?m. nation)Given a square matrix A and a olun matrix b, this function returns an upper tiangular matrix oltained by Gaussian elimination on A and a column matrixotained by performing the sme operations on the matix function [A, b] -felim(A, b) [m, n]-size (A); [m2, n2)-size ( b) ; if m TTor('A must be square end if m2 Tor('dimensions of A and b must match end if n2 error'b has to be a column vector a end .. for k=1:n-1 % forward elimination for i-k+1 if A(k,k) error('zero multiplier end multiplier = A(i ,k)/A( k, k); for j-k:n A(,A)-multiplier A(k,j) end b(i)-b)-multiple bk) end ao end 1 . Create a function backe ub(t,y) that, given an upper triangular matrix U and a column matrix y, returns the solution of Ux-y oltained ly using back substitution Belo. is the code fr a function felim(A,b) ?Jebm stand for forward r?m. nation)Given a square matrix A and a olun matrix b, this function returns an upper tiangular matrix oltained by Gaussian elimination on A and a column matrixotained by performing the sme operations on the matix function [A, b] -felim(A, b) [m, n]-size (A); [m2, n2)-size ( b) ; if m TTor('A must be square end if m2 Tor('dimensions of A and b must match end if n2 error'b has to be a column vector a end .. for k=1:n-1 % forward elimination for i-k+1 if A(k,k) error('zero multiplier end multiplier = A(i ,k)/A( k, k); for j-k:n A(,A)-multiplier A(k,j) end b(i)-b)-multiple bk) end ao end 1 . Create a function backe ub(t,y) that, given an upper triangular matrix U and a column matrix y, returns the solution of Ux-y oltained ly using back substitution