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Use the data in the tables below to answer the following questions: Average rates of return on Treasury bills, government bonds, and common stocks, 1900-2020. Standard deviation of returns, 1900-2020. a. What was the average rate of return on large U.S. common stocks from 1900 to 2020 ? b. What was the average risk premium on large stocks? c. What was the standard deviation of returns on common stocks? Note: Enter your answer as a percent rounded to 1 decimal place