17. In a previous Exercise, we revolved the region R bounded by the x-axis and f(x) = ex/4, where x = [0,3] about a horizontal line: either the x-axis, or y a. = 2. Suppose R is revolved around the y-axis. Give a rough sketch of the resulting solid, and find the exact volume of this solid using The Method of Cylindrical Shells. You will need Integration by Parts to compute the resulting integral. Section 33. Integration by Parts 1 b. Suppose R is revolved around the line x = 4. Give a rough sketch of the resulting solid, and find the exact volume of this solid using The Method of Cylindrical Shells. Note that this time the solid has a hole.