Suppose we have the following Treasury bill returns and inflation rates over an eight year period:.Year Treasury Bills Inflation1 7.55% 9.02% 2 8.29 12.69 3 6.15 7.24 4 5.43 5.20 5 5.83 7.10 6 8.04 9.44 7 11.00 13.72 8 12.58 13.05 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 8.11 % Inflation 9.68 %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 2.53 % Inflation 3.16 %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 %