Suppose we have the following Treasury bill returns and inflation rates over an eight- year period: Year NMO00 Treasury Bills 9.23% 10.10 7.84 6.92 7.42 9.73 12.57 14.35 Inflation 11.07% 14.66 9.03 6.59 8.79 11.23 15.40 15.20 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 Inflation b. Treasury bills Inflation c. Average real return 2.56%