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

Year	Treasury Bills	Inflation
1	10.45%	12.55%
2	11.36	16.00
3	9.06	10.29
4	8.34	7.97
5	8.88	10.29
6	11.23	12.77
7	14.11	16.98
8	15.97	16.90

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.)