The expected return of Skysong is 15.9 percent, and the expected return of Concord is 23.9 percent. Their standard deviations are 10.9 percent and 23.9 percent, respectively, and the correlation coefficient between them is zero. What is the expected return and standard deviation of a portfolio composed of 25 percent Skysong and 75 percent Concord? (Round intermediate calculations to 6 decimal places, e.g. 31.212564 and final answers to 2 decimal places, eg. 15.25%.) The expected return % Standard deviation of portfolio % What is the expected return and standard deviation of a portfolio composed of 75 percent Skysong and 25 percent Concord? (Round intermediate calculations to 6 decimal places, e.g. 31.212564 and final answers to 2 decimal places, eg. 15.25%.) The expected return % Standard deviation of portfolio % Would a risk-averse investor hold a portfolio made up of 100 percent of Skysong