Question 2) Consider the following mid sample Y1, ...,YT,r1 with a population mean y and variance 0%, a. Show that E[(Y; 17)2] = va'rOQ) 200v(}'1,}7)+ var(}7) b. Show that CO'U(?,Y5) = 0321/71 C. Use the results in (2a) and (2b) to show that E09?) = 0%