5. Evaluate the following integrals by applying the given change of variables. (a) I -24 A. where R is the region bounded by 3: - y x -2y =0, x -2y = 4, 3x -y = 1, 3x - y = 8. using -4+ 20 -3u + v 5 1 = 5 (b) ry' dA, where R is the region in the first quadrant bounded by 1= I, y = 4r, my = 1, xy = 4, using -, 1 = V