Problem 11-6 Risk Premiums (L01) Assume these are the stock market and Treasury bill returns for a 5-year period Stock Market T-8111 Return Year Return ( 2013 31.7 0.02 2014 10.9 0.02 2015 -1.6 0.02 2016 13.0 0.20 2017 21.3 0.80 Required: a. What was the risk premium on common stock in each year? (Negative values should be entered with a negative sign.) b. What was the average risk premium? c. What was the standard deviation of the risk premium? (Ignore that the estimation is from a sample of data)