Problem 11-1 Stock Market History (LO1) Use the data in the tables below to answer the following questions Average rates of return on Treasury bills, government bonds, and common stocks, 1900-2015 Average Premium (Extra return versus Treasury bills) (%) Portfolio Treasury bills Treasury bonds Common stocks Average Annual Rate of Return (%) 3.8 5.3 11.4 1.5 Standard deviation of returns, 1900-2015 Portfolio Treasury bills Long-term government bonds Common stocks Standard Deviation (%) 2.9 9.0 19.9 a. What was the average rate of return on large U.S. common stocks from 1900 to 2015? (Enter your answer as a percent rounded to 1 decimal place.) verage rate o return b. What was the average risk premium on common stocks? (Enter your answer as a percent rounded to 1 decimal place.) erage risk remium