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.

Cola Co. (%) Gas Co. (%) January 0.0240 0.0620 February 0.0090 -0.0460 March 0.0160 0.0460 April -0.0160 -0.0590 May 0.0280 0.0380 June 0.0460 0.0600 July 0.0080 -0.0040 August -0.0080 -0.0200 September -0.0080 -0.0360 October -0.0040 0.0060 November 0.0590 0.0180 December -0.0140 0.0260

What is the average mothly return for both Cola Co. & Gas Co.? What is the variance for both Cola Co. and Gas Co.?