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Coding for MATLAB.

5.2 (*). How to solve a triangular system. 1. Write a function whose heading is function x=For Sub(A,b) computing by forward substitution (Algorithm 5.1) the solution, if it exists, of the system Ar=b, where A is a lower triangular square matrix. 2. Write similarly a function BackSub(A,b) computing the solution of a sys- tem whose matrix is upper triangular. Data: A, 6. Output: 1 = A-6. For i = 1 S=0 For j=1/i-1 8= 8 + Age End j Ii = (bi - 5)/Ai,i Endi Algorithm 5.1: Forward substitution algorithm. 5.2 (*). How to solve a triangular system. 1. Write a function whose heading is function x=For Sub(A,b) computing by forward substitution (Algorithm 5.1) the solution, if it exists, of the system Ar=b, where A is a lower triangular square matrix. 2. Write similarly a function BackSub(A,b) computing the solution of a sys- tem whose matrix is upper triangular. Data: A, 6. Output: 1 = A-6. For i = 1 S=0 For j=1/i-1 8= 8 + Age End j Ii = (bi - 5)/Ai,i Endi Algorithm 5.1: Forward substitution algorithm