Exel will do, I need help with Excel entries

Using the data in the following table, :, calculate the volatility (standard deviation) of a portfolio that is 68% invested in stock A and 32% in stock B. The volatility of the portfolio is %. (Round to two decimal places.) i Data Table (Click on the icon located on the top-right corner of the data table below in order to copy its contents into a spreadsheet.) Year 2010 2011 2012 2013 2014 2015 Stock A - 11% 6% 4% -6% 1% 10% Stock B 26% 27% - 5% - 14% 24% 24% Print Done Enter your answer in the answer box and then click Check