9.6. C: Volumes by revolutions. Problem 9.34. Compute the volumes (by both the slicing and the cylin- drical shells method) of the solid obtained by revolving around the line r = 1 the region between the graph of y = VI and y = 12. 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 = vr + 2 and y = r. Problem 9.36. Compute the volumes (by both the slicing and the cylin- drical shells method) of the solid obtained by revolving around the 1-axis the region between the graph of y = r and x = y' for r > 0. Problem 9.37. Compute the volumes (by both the slicing and the cylin- drical shells method) of the solid obtained by revolving around the line y = -1 the region between the graph of y = 23 and r = y for a > 0. Problem 9.38. Compute the volumes (by both the slicing and the cylin- drical shells method) of the solid obtained by revolving around the line y = 5 the region between the graph of y = a" and x = y' for r > 0. Problem 9.39. Compute the volumes (by both the slicing and the cylin- drical shells method) of the solid obtained by revolving around the line r = 2 the region between the graph of y = 13 and r = y' for r > 0