1. Suppose you want to solve the equation 1 5 2 0 ? -7 8 T 4 -5 2{ |9 # -8B - T 0 w (a) Set up an augmented matrix and go through row reduction to find the solution. (10 points) (b) Find the LU decomposition of the 3 x 4 matrix on the left-hand side of the above matrix equation. (10 points) (c) Solve the above matrix equation using the LU decomposition. (10 points) \f