please show me how to find the varriance

Using the data in the following table, estimate the average return and volatility for each stock. Year 2008 2009 2010 2011 2012 2013 Realized Returns Stock A Stock B - 1% 14% 11% 29% 8% 8% - 1% - 3% 1% -7% 8% 15% The return of stock A is 4.33 %. (Round to two decimal places.) The return of stock B is 9.33 %. (Round to two decimal places.) The variance of stock Ais (Round to five decimal places.)