The last 7-year performance of 2 stocks traded in Borsa Istanbul has been examined, and their return amounts are given below as a percentage (%): Year 1 2 Return-Stock X 12.6 20.7 Return-Stock Y 13.6 5.3 3 11.8 20.7 4 9.7 15.4 5 8.9 16.3 6 9.6 11.0 a. Calculate the mean and standard deviation of the returns for each stock. b. Calculate the coefficient of variation of returns for each stock. c. Indicate which stock has the higher risk according to your calculations. 7 10.5 4.4