Consider the following table for a period of six years:

	Returns
Year	Large-Company Stocks					U.S. Treasury Bills
1			15.89	%		7.53	%
2			26.83			8.11
3			37.47			6.11
4			24.17			6.27
5			7.64			5.57
6			6.81			8.00
We know the arithmetic average returns for large-company stocks and T-bills over this time period. Large-company stock: 3.01% T-bills: 6.93% a) What is the Standard deviation for T-bills? Calculate the observed risk premium in each year for the large-company stocks versus the T-bills. b) What was the arithmetic average risk premium over this period? c) What was the standard deviation of the risk premium over this period?