I think I am wrong with 0.052 expected return, please help me figure this out and recalculate everything here!

Problem 6.17 Ben would like to invest in gold and is aware that the returns on such an investment can be quite volatile. Use the following table of states, probabilities, and returns and determine 0.1 0.2 0.3 0.2 0.2 robabili 300m Good 0k Slump What is the expected return on den's gold investment? (Round answer to 3 decimal places, e.g. 0.076.) Retu 27% 22% 11% 50/0 -31% Expected return LINK TO TEXT 0.052 What is the standard deviation of the return on den's gold investment? (Round intermediate calculations and answer to 5 decimal places, e.g. 0.07680.) Standard deviation Click if you would like to Show Work for this question: LINK TO TEXT Open Show Work