Suppose we have the following returns for large-company stocks and Treasury bills over a six-year period:

Year	Large Company	US Treasury Bill
1	3.92%	5.90%
2	14.18	2.53
3	19.37	3.76
4	14.31	7.16
5	31.80	5.42
6	37.08	6.24

a.	Calculate the arithmetic average returns for large-company stocks and T-bills over 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 the returns for large-company stocks and T-bills over this period. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.)