Using the data in the following table,, calculate the volatility (standard deviation) of a portfolio that is 67% invested in stock A and 33% in stock B. The volatility of the portfolio is%. (Round to two decimal places.) (Click on the following icon Year Stock A Stock B 2010 - 2% 17% in order to copy its contents into a spreadsheet.) 2011 11% 6% 2012 10% 20% 2013 - 1% - 1% 2014 2% - 9% 2015 13% 22%