9. Sketch the region S bounded by the curves and use the shell method to give the formula that will find the volume of the solid generated by revolving ? about the y-axis. y = Vx, x =4, y=0 4 A. 2rava dx o 4 B. 27x(4 - vx) dx .2 C. o T(16 - 34) dy .2 D. 2ry(y2 - 4) dy o E. none of the above