Find the volume of the solid obtained by rotating the region enclosed by yzxs, y:9:c, 2:20 about the line y = 0 using the method of disks or washers. Volume = f :5. ll Use the method of cylindrical shells to nd the volume generated by rotating the region bounded by the curves y : 4 + 3x 7 :32 and y + x = 4 about the yaxis. Below is a graph of the bounded region. Volume = y