need help quickly please; will give like for correct solution

15. [12 pts] Let F = x'i -3y z?j+(2yz3 -3x z)k, and S be boundary of be the solid region bounded by the cylinder x + y' =4 and planes = =0 and z =3 . Use the divergence theorem to find IF . ndS , the flux cross S .The Divergence Theorem Let R be a solid region bounded by a closed surface S . If F is a continuously differentiable vector field on R, then F . nds = V . Fav R where n is the exterior unit normal vector function on S