20. Compute the surface integral I = ff (V X F)-dS, Where S is the portion of the ellipsoid s 3:):2 + 3342 + 22 = 28 that lies above the plane 2 = 1, F = (yz2, 4112,932y), and d8 = ndS with n being the unit normal to S with a positive k component. HINT: Use Stokes' theorem