Warren is an investor who believes that past varlability of stocks is a reasonably good estimate of future risk associated with the stocks. Warren works on creating a new portfolio and has already purchased stock A. Now he considers two other stocks, B and C. Warren collected data on the historic rates of return for all three stocks, which are presented in the following table. Year Stock A Stock B Stock C 2013 40% -5% 35% 2014 -10% 40% -5% 2015 35% -10% -10% 2016 -5% 35% 40% 15 15 15 Average return Estimated standard deviation 26.14 26.14 26.14 Suppose Warren can only afford to complement stock A by adding just one of the two other stocks, either stock B or stock C. Complete the following table by computing correlation coefficients between stocks A and B and between stocks A and C, and calculate average returns and standard deviation for the two potential portfolios, AB and AC: Stocks A and C Stocks A and B -0.99 -0.99 Correlation coefficient Average return Standard deviation 15% 15% 18.48% 18.48%