Suppose we have the following Treasury bill returns and inflation rates over an eight- year period: Inflation Year Treasury Bills 8.27% 1 10.02% 9.09 13.55 6.19 7.33 5.32 5.04 5.77 7.09 8.03 9.48 11.02 13.80 12.70 13.30 a. Calculate the arithmetic average return for Treasury bills and the average annual inflation rate (consumer price index) for this period. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) Average return % Treasury bills Inflation % 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.) 2345678 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.) Standard deviation Treasury bills % % Inflation c. What is 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.) Average real return %