Question 3. Evaluate e² £² -dz 2² +4 Y for y being a closed contour, a) y(t) = 4eit, b) y(t) Hint: use the representation and apply the Cauchy integral theorems. 1 z² +4 - = Z eit, te [0, 2π]. A - 2i - + B z+ 2i

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