Question 2) Consider the following ma sample Y1, ...,Yn with a population mean My and variance (732/ a. Show that 13mg; 3'02] 2 yam/i) 2mm, 37) + mm?) b. Show that COU(?,}/i) = orig c. Use the results in (2a) and (2.b) to show that E(s}2/) = 0%