Engineering Mathematics - Complex Analysis

Let C be a clockwise oriented closed curve in the complex plane defined by |z| = 1. Further, let f(z) = jz be a complex function, where j = √-1. Then, ∮_C f(z)dz = ________ (round off to the nearest integer).

If C is a circle $|z| = 4$ and $f(z) = \frac{z^2}{(z^2-3z+2)^2}$, then $\oint_C f(z)dz$ is