Use the divergence theorem to calculate the surface integral ff F - d5; that is, calculate the flux of F across 5. s F(x, y, z) = xyezi + xy223j yezk, S is the surface of the box bounded by the coordinate planes and the planes x = 3, y = 6, and z = 1 E Find an equation of the tangent plane to the given parametric surface at the specified point. x=u+v, y=4u2, z=uv; (2,4,0)