Suppose we have the following Treasury bill returns and inflation rates over an eight- year period: Year Treasury Bills Inflation 123456700 8.81% 10.60% 9.66 14.18 7.42 8.59 6.52 6.21 7.00 8.35 9.29 10.77 12.11 14.92 8 13.85 14.60 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.) Treasury bills Inflation Average return % % 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 %