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	3.69	4.75
2	14.48	3.59
3	19.27	4.18
4	14.41	5.91
5	31.90	5.32
6	37.51	6.41

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

	Average returns
Large company stocks	%
T-bills	%

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

	Standard deviation
Large company stocks	%
T-bills	%

c-1

Calculate the observed risk premium in each year for the large-company stocks versus the T-bills. What was the average risk premium 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, e.g., 32.16.)

Average risk premium

%

c-2	Calculate the observed risk premium in each year for the large-company stocks versus the T-bills. What was the standard deviation of the risk premium over this period? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

Standard deviation

%

i already know large company stocks average return is 4.77 and T-bills average return is 5.03 and the large company stocks standard deviation is 24.86 but i dont know how to figure out the standard deviation for t-bills, the average risk premium and the standard deviation of risk premium. please help!