The following spreadsheet contains monthly returns for Cola Co. and Gas Co. for 2013. Using these data, estimate the average monthly return and the volatility for each stock. Month January February March April May June July August September October November December Cola Co. -6.80% 7.40% -2.10% 4.30% 11.30% 1.40% 4.10% -0.60% 0.80% 1.90% 0.70% - 2.90% Gas Co. -3.00% - 7.70% 0.20% 3.10% - 1.00% 0.00% 4.80% - 3.80% - 5.80% 1.20% -2.30% 4.70% The average monthly return for Cola Co. is %. (Round to two decimal places.) You have a portfolio with a standard deviation of 28% and an expected return of 17%. You are considering adding one of the two stocks in the following table. If after adding the stock you will have 25% of your money in the new stock and 75% of your money in your existing portfolio, which one should you add? Expected Return 13% 13% Standard Deviation 26% 19% Correlation with Your Portfolio's Returns 0.3 0.6 Stock A Stock B Standard deviation of the portfolio with stock A is %. (Round to two decimal places.)