Using the data in the following table, and the fact that the correlation of A and B is 0.38, calculate the volatility (standard deviation) of a portfolio that is 60% invested in stock A and 40% invested in stock B. (Click on the following icon in order to copy its contents into a spreadsheet.)

	Realized Returns
Year	Stock A		Stock B
2008	10%		21%
2009	15%		31%
2010	2%		14%
2011	5%		2%
2012	2%		14%
2013	9%		18%