Use the data in the tables below to answer the following questions:

Average rates of return on Treasury bills, government bonds, and common stocks, 19002015.

Portfolio	Average Annual Rate of Return (%)			Average Premium (Extra return versus Treasury bills) (%)
Treasury bills		3.8
Treasury bonds		5.3			1.5
Common stocks		11.4			7.6
Standard deviation of returns, 19002015. PortfolioStandard Deviation (%)Treasury bills 2.9 Long-term government bonds 9.0 Common stocks 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.) b. What was the average risk premium on common stocks? (Enter your answer as a percent rounded to 1 decimal place.) c. What was the standard deviation of returns on common stocks? (Enter your answer as a percent rounded to 1 decimal place.)