3. Stocks A and B have the following historical returns: Year Stock A's Returns, ra Stock B's Returns, B 2014 (20.90%) (12.70%) 2015 25.75 29.30 2016 19.75 28.90 2017 (5.75) (11.60) 2018 22.25 7.20 a. Handwritten solutions required for this question. Calculate the average rate of return for each stock during the period 2014 through 2018. | b. Calculate the variance of return for each stock during the period 2014 through 2018 Calculate the standard deviation of return for each stock during the period 2014 through 2018