Consider the expression [0 27ry((1 + m (1 a dy + f 2mm + 5) (y - 1)) dy This expression is equal to a volume of revolution when a region is rotated about the maxis, using the method of shells. (a) Sketch the region in question. (b) Write down an expression for the volume of the same region, with the same rotation, using the method of disks. (0) Calculate both your answer from (b), and the expression above for shells, and conrm that they give the same