16.11. Let be the unit circle |2 = 1 traversed twice in the clockwise direction. Evaluate dz (a). Log (+2)dz. (b). 3221 16.3. Evaluate each of the following integrals where the path is an arbitrary contour between the limits of integrations (a). ri/2 +21 3 edz, (b). cos (5) dz, (c). (z-3)³dz. 0