Fill in the missing information in the following table. Assume that Portfolio AB is 40 percent invested in Stock A. (A negative value should be indicated by a minus sign. Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places.) Year 2015 2016 Portfolio AB % % % % % 2017 Annual Returns on Stocks A and B Stock A Stock B 15.0 % 25.0 % 35.4 % -35.6 % -17.8 % 45.6 % 25.2 % 16.8 % 14.6 % 26.4 % % % % % 2018 2019 Average return Standard deviation % %