Need help with 3 & 4 only. Graph included as well.

3. Find the solid volume of the curve y = x3 intersecting with y = Vx about x-axis. [Hint: use area ntr?] Find the solid volume of the curve y = \\x intersecting x =0 and y = 2 about x-axis. 4. [Hint: use cylindrical shell method and integrate across the y-axis]