Using the data in the following table, :, calculate the volatility (standard deviation) of a portfolio that is 66% invested in stock A and 34% in stock B. C The volatility of the portfolio is % (Round to two decimal places.) 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 Stock A Stock B 2010 - 14% 2011 8% 37% 2012 2% 24% 2013 - 2% - 1% 2014 4% -14% 2015 12% 35% 14%