Let R be the region in the plane bounded by the y-axis and the graphs of y=|2x| and y=3+x. (a) Set up an integral or integrals to represent the volume of the solid obtained by revolving R around the x-axis. No need to evaluate the integrals.
(b) Set up an integral or integrals to represent the volume of the solid obtained by revolving R around the line y = -2. No need to evaluate the integrals.
(c) Set up an integral or integrals to represent the volume of the solid obtained by revolving R around the line x = 4. No need to evaluate the integrals