(2) Find the volumes of the Ry regions bounded by the specified curves and revolved about the y-axis. a) y = x, y = 5 and x = 0 b) y = 9 - x2, x = 0 and y = 0 c) y = 23, x = 0, y =1 and y = 8 d) y = x2 + 1, y = 0, x = 0 and x =1 e) y = x3, y = 1 and x =1