Suppose we have the following Treasury bill returns and inflation rates over an eight-year period:

Year	Treasury Bills	Inflation
1	9.87%	11.87%
2	10.76	15.36
3	8.48	9.69
4	7.78	7.43
5	8.30	9.69
6	10.63	12.15
7	13.49	16.34
8	15.31	16.22

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.)