Q3: Apply the Cauchy-Goursat theorem to show that ∫_c f(z)dz = 0, when the contour C is the unit circle |z| = 1 in either directions
(a) f(z) = z² / (z-3)
(b) f(z) = 1 / (z²+2z+2)
Q4: let C denote the positively oriented boundary of the square whose sides lie along the lines x = ±2 and y = ±2, evaluate ∫_c e^-z / (z - (πi/2))