Problem 9.35. Compute the volumes (by both the slicing and the cylin- drical shells method) of the solid obtained by revolving around the .r-axis the region between the graph of y = a: + 2 and y = 3:. Problem 9.36. Compute the volumes (by both the slicing and the cylin- drical shells method) of the solid obtained by revolving around the y-axis the region between the gaph of y = 1:3 and :1: = y" for a: > 0