5. Use Stokes' theorem to evaluate: a). (-2y dx + 3.x dy + 10z dz), Jc where C is the circle (x - 1)2 + (y - 3)2 = 25, z = 3. b). V X F) . ndS, JS for F = 6yzi + 5x j + yzer k, where the upwardly oriented surface S is the portion of the paraboloid z = -T- 4 1 2 4 72 for 0