Evaluate the surface integral f(x,y,z) dS using a parametric description of the surface. S f(x,y,z) =2x + 2y", where S is the hemisphere x + y 2 + z 2 =25, for z 2 0 Write a parametric description of the given hemisphere using u = and v = 0. r(u, v) = ( where 0 s us and EVE (Type exact answers.) The value of the surface integral is (Type an exact answer.)