1. An LDU factorization of a square matrix A is a factorization A=LDU, where L is a unit lower triangular matrix, D is a diagonal matrix, and U is a

unit upper triangular matrix (upper triangular with 1s on its diagonal). In exercise 32, find LDU factorization of A. (SHOW ALL YOUR WORK) Exercise 4 states as follows: Solve the system Ax=b using the given LU factorization of A.