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. $($Click on the following icon in order to copy its contents into a spreadsheet.$)$

$\backslash$table$[[,$Cola Co$.,$Gas Co$.],[$January$,-1\mathrm{.}80\%,8\mathrm{.}20\%$