Problem 11-6 Risk Premiums (LO1) Assume these are the stock market and Treasury bill returns for a 5-year period Stock Market T-Bill Year Return(%) Return(%) 2011 2012 2013 2014 2015 -34.03 32.10 14.16 3.98 19.76 4.40 0.80 0.28 0.05 0.07 a. What was the risk premium on common stock in each year? (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places.) Year Risk Premium 2011 2012 2013 2014 2015 b. What was the average risk premium? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 b. What was the average risk premium? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) Average risk premium c. What was the standard deviation of the risk premium? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) Standard deviation