these data, estimate the average monthly return and the volatility for each stock. (Click on the following icon in order to copy its contents into a spreadsheet.) January February March April May June July August September October November December - 1.80% -3.70% -0.05% -1.20% 1.90% 1.90% 0.60% -2.10% 4.10% -2.40% -8.60% -2.50% 8.20% -4.60% 5.50% 1.90% - 1.00% 4.90% -2.70% - 6.00% 4.50% 1.70% -3.70% 4.80% The average monthly return for Cola Co. is %. (Round to two decimal places.)