Calculate the following surface integrals of scalar functions.
(a) ∬_S (x^2 + z^2) dS, where S is the cylinder parametrized in problem 5(c).
(b) ∬_S 4xy dS, where S is the parabolic cylinder parametrized in problem 5(e).
(c) ∬_S (2 + z) dS, where S is the spherical region parametrized in problem 5(f).
What is the surface area of the paraboloid parametrized in problem 5(b)?