Find the volume of the region bounded above by the paraboloid z = 12 x2 - Y2 and below by the paraboloid z = 11x2 +11y2. The volume is E. (Type an exact answer, using 11: as needed.) Find the average value of the function f(r,0,z) = r over the region bounded by the cylinder r = 3 and between the planes z = - 3 and z = 3. The average value is (Type a simplified fraction.)