The following spreadsheet contains monthly returns for Cola Co. and Gas Co. for 2010. Using these data, calculate the average monthly return and volatility for each stock. Then calculate the average return and volatility of a portfolio that is 55% invested in Cola Co. stock and 45% invested in Gas Co Realized Returns Date Jan Feb Mar Cola Co Gas Co Portfolio of 55% Cola and 45% Gas -6.00% 1.28% -1.86% -1.90% 7.40% -0.26% 8.360% -2.46% -2.00% 0.00% 4.68% 2.22% -10.84% 2.36% 6.600% 2.01% 18.36% -1.22% 2.25% -6.89% -6.04% 13.61% 3.51% 0.54% May Jun Jul Sep Oct Nov Dec Average return Volatility (standard Deviation The following spreadsheet contains monthly returns for Cola Co. and Gas Co. for 2010. Using these data, calculate the average monthly return and volatility for each stock. Then calculate the average return and volatility of a portfolio that is 55% invested in Cola Co. stock and 45% invested in Gas Co Realized Returns Date Jan Feb Mar Cola Co Gas Co Portfolio of 55% Cola and 45% Gas -6.00% 1.28% -1.86% -1.90% 7.40% -0.26% 8.360% -2.46% -2.00% 0.00% 4.68% 2.22% -10.84% 2.36% 6.600% 2.01% 18.36% -1.22% 2.25% -6.89% -6.04% 13.61% 3.51% 0.54% May Jun Jul Sep Oct Nov Dec Average return Volatility (standard Deviation