2012 -17.50% -12.70% 2013 23.25 18.40 2014 17.00 31.90 2015 -2.75 -8.30 2016 33.75 24.45 a. Calculate the average rate of return for each stock during the 5-year period. Round your answers to two decimal places. Stock A 10.75 9% Stock B 10.75 9% b. Assume that someone held a portfolio consisting of 50% of Stock A and 50% of Stock B. What would have been the realized rate of return on the portfolio in each year? What would have been the average return on the portfolio during this period? Round your answers to two decimal places. Year Portfolio 2012 -15.1 9% 2013 20.83 9% 2014 24.45 9% 2015 -5.53 9% 2016 29_1 @% Average return 10.75 9% c. Calculate the standard deviation of returns for each stock and for the portfolio. Round your answers to two decimal places. rA r3 Portfolio