please calculate the volatility of Cola Co and Gas Co.

Co. for 2013. Using these data, estimate the average monthly return and the volatility for each stock January February March April May June -0.20% - 7.20% 6.26% -7.10% 1.60% -4,90% 3.00% -2.70% 0.00% 10.50% 4.90% 4.20% 0.30% -3.90% -3.70% 4.90% -5.70% -4.80% 0.70% -6.409 -0.00% 10.2006 -6.70% -1.50% July August September October November December The average monthly return for Cola Co. is 0.70%. (Round to two decimal places.) The average monthly return for Gas Co. is - 1.44 %. (Round to two decimal places.) The volatility for Cola Co. is %. (Round to two decimal places.) Enter your answer in the answer box and then click Check