Solve using cylindrical shell. 1. Solve the volume of a sphere whose radius is r. 2. Find the volume generated by revolving the area under the curve y = e* from x = 0 to x = 1 about the x - axis. 3. Find the volume generated by revolving the area under the curve y = ex from x = 0 to x = 1 about the y - axis. 4. Find the volume generated by revolving the area under the curve y = ex from x = 0 to x = 1 about the line x = 1. 5. Find the volume generated by revolving the area bounded by the curve y = (1 - x2)2 and the x - axis about the y - axis