ineed help w parts a and b please!!! have gotten it wrong 3 times and am not sure where im messing up. thank you for your help :) I cannot get part B to fit in the screenshot but its identical except it is rotating about the x axis. All other formulae and values are the same as part a. I have been on this question for nearly an hour, I really appreciate the help!!

Use either the shell method or the disklwasher method to nd the volume of the solid of revolution generated by revolving the shaded region bounded by the graphs of f (x) = x2 + 21 and g(x) = 8x + l and the yaxis about the x-axis. The graph is not drawn to scale. The graphs f and g intersect at (2, 17). acY (Express numbers in exact form. Use symbolic notation and fractions where needed.)