a) Find the divergence and the curl of the vector field F x G, where F(x, y, z) = 2xyi yzj 2z?k and G(x, y, z) = 3xyi 5yzj + zk at (-1, 1, -1). b) Using Spherical Coordinates, find the volume of the solid G bounded above by the sphere x? + y? + z? = 25 and below by the cone z = 2/x2 + y?. %3D