Compute the following matrix-vector product. If a product is not defined, explain why. 1 0 (1) 3-1 0 1 -1 1 (2) 0 0 (3) 3 -3 Problem 2. Rewrite the following system of linear equations as (1) vector equation and (2) matrix equation (Ax = b). You are NOT required to solve the system. 3x1+x25x39 = - x2 + 4x3 = 0