Question 1531 1-6 3 11-9 -2 2 (a) Find the LU decomposition for the matrix Then use L, U to solve the system Ax - -2 3) for (b) Now consider the general problem of solving As -h , for a given matrix A C Re. Assuming that the factorization LU A has already been computed, write out in detail the algorithm for solving Ax-b using forward and backward substitution