5. Weekly problem #7. Here it is: A conical frustum is the solid formed by starting with a cone and then chopping it off by a plane parallel to the base. Consider a conical frustum with top radius r, bottom radius R, and height ( distance between the two bases) h. (a) Write a general Riemann sum that approximates the volume of this frustum. NO (b) Show that the volume of this frustum is $ (r2 + R2 + rR)h