Suppose we have the following Treasury bill returns and inflation rates over an eight year period: 11 .07% 9.23% 10.10 7.84 6.92 7.42 9.73 12.57 14.35 6.59 8.79 11.23 15.40 15.20 7 a. Calculate the average return for Treasury bills and the average annual inflation rate for this period. (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places, e.g 32.16.) Treasury bills 9.77 % Inflation 11.49 % b. Calculate the standard deviation of Treasury bill returns and inflation over this period. (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places, e.g, 32.16.) Treasury bills Inflation c. What was the average real return for Treasury bills over this period? (Negative amount should be indicated by a minus sign. Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g. 32.16.) Average real return