Let F be the vector field given by F (x, y, Z) = In(x y z2+1) - yx e2z, cos(xz)xy2, ex ) + cos z sin(z 27+ 14+5 Let S be the upper hemisphere (z > 0) of the sphere of radius 2 centred at the origin, oriented with unit outward normal. By using a version of Stokes' theorem, compute Is ( V X F) . has