1. [10pts] (Section 16.6) Find the center of mass of the region bounded by y = a: and y = 332. Assume constant density. 2. [10pts] (Section 166) A solid in the rst octant is bounded by the two spheres 3:2 | 3,12 + 22 = 1 and 3:2 + y2 + 22 = 4 and the cone 22 = 3:2 + y2r Find the mass of the solid if its density is given by 5(cc,y, z) = 6(m2+y2+22)3/2