Please answer the question in the picture thanks!

Suppose that, for some a > 0, the pdf of random variable Y is fy (r) a for r > 1 (and zero otherwise). As a first step, find the value of a that makes fy (r) well-defined pdf. Then compute the CDF of Y. What is that CDF? O Fr (t) = () fort 2 1 (and zero otherwise) OFy (t)2 ta+2 1:11 fort 2 1 (and zero otherwise) OFYO= () fort > 1 (and zero otherwise) OFy (t) 1 ) fort > 1 (and zero otherwise)