Suppose we have the following Treasury bill returns and inflation rates over an eight- year period: Year Treasury bills Inflation 1 8.62% 10.40% 2345678 9.46 13.96 7.23 8.39 4 6.34 6.04 5 6.81 8.15 9.09 10.56 11.90 14.70 13.62 14.33 a. Calculate the average return for Treasury bills and the average annual inflation rate for this period. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) b. Calculate the standard deviation of Treasury bill returns and inflation over this period. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) c. What was the average real return for Treasury bills over this period? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) a. Treasury bills a. Inflation % % b. Treasury bills % b. Inflation %