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

Year	Treasury Bills	Inflation
1	11.47%	14.07%
2	12.41	17.11
3	10.08	11.34
4	9.33	8.93
5	9.90	11.34
6	12.28	13.85
7	15.19	18.09
8	17.11	18.07

Calculate the average return for Treasury bills and the average annual inflation rate for this period.

Treasury bills	%
Inflation	%

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

Treasury bills	%
Inflation	%

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)

Average real return

%