8-20 REALIZED RATES OF RETURN Stocks A and B have the following historical returns Stock A's Returns, rA Stock B's Returns, rB Year (18.00%) (14.50%) 2011 2012 21.80 33.000 30.50 2013 15.00 (0.50) 2014 (7.60) 2015 27.00 26.30 a. Calculate the average rate of return for each stock during the period 2011 through 2015. b. Assume that someone held a portfolio consisting of 50% of Stock A and 50% of Stock B. What would the realized rate of return on the portfolio have been each year? What would the average return on the portfolio have been during this period