3. An open cylinder 362 + y2 : 25, 0 S 2 S 5 of solid metal has the density function p(:c, y, z) = z. Find the mass of the cylinder. (6 points) Your answer should include: a) Sketch of the shaded surface. b) Appropriate shaded region for the double integral. c) Parametrization for the surface of the cylinder. d) Evaluation of the surface integral