During the past five years, you owned two stocks that had the following annual rates of return: Year Stock A Stock B 2013 -12% -18% 2014 18% 23% 2015 22% 25% 2016 28% 22% 2017 -11% 2%Required:i. Compute the arithmetic mean annual rate of return for each stock. (4 Marks) ii. Compute the standard deviation of the annual rate of return for each stock. (4 Marks) iii. Compute the coefficient of variation for each stock. 2 Marks) iv. Highlight four limitations of portfolio analysis