Complex Analysis 17 problem

Here I solved total 17 problem .I used Cauchy theory for finding out residue .It is important for learner .I solved Laurent series problem .

[lokenaththakur]

Suppose f(z) is an analytic and not univalent in the open unit disc, then show that there two point namely p, q in the disc of same modulus such that f(p) = f(q)

[lokenaththakur]

How to work with this problem, sir ???