D Question 9 1 pts Suppose that, for some a > 0, the pdf of random variable Y is fy (r) = for 2 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 Fy (t) = 1 - () fort 2 1 (and zero otherwise) O Fr (t) = (1) fort > 1 (and zero otherwise) OFY (t ) = ( ) [tat2 - 1 fort 2 1 (and zero otherwise) O Fy (t) = - () fort > 1 (and zero otherwise)