The first octant inside the cylinder x2 + y2 = 16 and below the plane z = 3. 2 sketch the solid whose volume is given by the integral. ∫ π/2. 0. ∫ 2. 0. ∫ 9−r2. 0 r dz dr dθ, and evaluate the integral. 3 use spherical coordinates to evaluate. ∫∫∫. e z dv , where e lies between the spheres x2+y2+z2 = 1 and x2 +y2 + z2 = 4 in