Fill in the missing information in the following table. Assume that Portfolio AB is 50 percent invested in Stock A. (Negative values should be indicated by a minus sign. Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places. Omit the "%" sign in your response.)

Annual Returns on Stocks A and B
Year	Stock A		Stock B		Portfolio AB
2009	11.5	%	21.5	%		%
2010	36.8	%	37.7	%		%
2011	20.6	%	47.7	%		%
2012	25.9	%	16.1	%		%
2013	13.2	%	24.3	%		%
Average return		%		%		%
Standard deviation		%		%		%