Let R be the same region used in C11. Parts {a} and [bi below are worth 4 points each. For each part, writing down the correct integral is worth only one point out of 4. For the remaining three points: state whether you Iwill be using the method of washers, or the method of shells, and why you chose that particular method. rr here may be more than one reason for choosing a particular method -- include each one that you observe.) Then, clearly explain how you gured out the setup of your integral. Do not. evaluate either integral. a} Set up an integral to compute the volume of the solid of revolution generated by revolving R about the z axis. b] Set up an integral to compute the volume of the solid of revolution generated by revolving R about the y axis. Let R be the region bounded by = = 0, y = I', and y = 2+ =(1 - 2)2