Standard deviation is missing

Ch 11 Homework Problems Saved Help Save & Exit Submit Check my work mode: This shows what is correct or incorrect for the work you have completed so far. It does not indicate completion. Return to question 3 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.) 10 points X Answer is not complete. Year Annual Returns on Stocks A and B Stock A Stock B 15.0 % 23.0 Portfolio AB 19.80 % 2015 % 34.6 % -34.4 % 2016 2017 -16.2 % 44.4 % -6.80 % 20.16 % 20.24% 24.8 % 17.2 % 2018 2019 15.4 % 27.6 % 22.72 % 14.72% 15.56% 15.22% Average return Standard deviation % % %