Problem 5. Use either the Cauchy-Goursat Theorem, the Principle of Deformation of Paths, or the Cauchy Integral Formula to evaluate the given integrals.
(a) ∫_C 1/(z^2 - 3z - 4) dz where C is the square with sides along x = ±2 and y = ±2 in the positive sense.
(b) ∫_C e^z/(z + 3i) dz where C is the circle |z - 4i| = 2 in the positive sense.