Use a parametrization to express the area of the surface as a double integral. Then evaluate the integral. The portion of the cylinder x + y = 16 between the planes z = 5 and z = 7 Let u = z and v=0 and use cylindrical coordinates to parameterize the surface. Set up the double integral to find the surface area. du dv (Type exact answers.) After evaluating the double integral, the surface area is (Type an exact answer in terms of I.)