2. a. Approximate the volume V of a y hemisphere of radius I by using four disks of equal thickness, with the (x, y ) cross-sectional area evaluated at 3 5 8 ' 8 . 8, and 8 0 X b. By using n disks and evaluating v at the right endpoints, show that the volume V of the hemisphere is A(x) V- lim c. Use the result of part (b) to verify that V = 37 cubic units