Using the data in the following table, and the fact that the correlation of A and B is 0.75, calculate the volatility (standard deviation) of a portfolio that is 50 % invested in stock A and 50 % invested in stock B.

Using the data in the following table, and the fact that the correlation of A and B is 0.75, calculate the volatility (standard deviation) of a portfolio that is 50% invested in stock A and 50% invested in stock B. Year 2008 2009 2010 2011 2012 2013 Realized Returns Stock A Stock B -2% 13% 12% 31% 4% 6% - 1% -4% 2% 10% 9% 25% The standard deviation of the portfolio is %. (Round to two decimal places.)