4 a. (3 pts) When computing the volume of the solid of revolution in 3 b. using the Ed method of discs/washers, we consider cross sections of the solid instead of cylindrical shells. Sketch a typical such cross section for this solid. 1 d. 1) ( at) Campohors wigSdigs Lig edging sila yd banod forgeT offs ilbagle (elg 9) . 8 and the value it apprendmates 4 b. (5 pts) Compute the volume of the solid of revolution from 3 b. using the method of discs / washers. the Ar andJ JobienoD (atq 8) de