The stock of Dream Works A nimation sells for $60 a share. Its likely dividend sayout and end-of-year price depend on the state of the economy by the end of the year as follows: Calculate the standard deviation of the return on a portfolio invested 60% n Dream Works Animation and 40% in Treasury bills. The return on bills 3%. The three states of the economy are equally likely. (a) 23.10% b) 11.55% (c) 15.56%