2013. Using these data, estimate the average monthly return and the volatility for each stock. (Click on the following icon a spreadsheet.) January 9.40% - 3.00% in order to copy its contents into February 2.20% March -6.29% April 7.40% May -0.10% June -1.80% July 0.10% August September October November December 1.90% - 5.40% -4.10% 0.40% -0.30% 0.40% -2.50% - 2.10% 0.50% 6.20% - 1.50% 2.50% 5.70% 0.30% 5.80% 0.60%