Please answer all questions and show work with the simplest way to solve with explanation, thank you.
12. Set up an integral for the volume of the solid created by re- volving the region bounded by y = 1-r' in the first quadrant around the x-axis. 13. Set up the integrals to find the volume of the solid created by revolving the region bounded by y y 2r, and around the y-axis using BOTH washers and shells.