Consider the following table for a period of six years.

Returns
Year	Large-Company Stocks					U.S. Treasury Bills
1973			14.69	%		7.29	%
1974			26.47			7.99
1975			37.23			5.87
1976			23.93			5.07
1977			7.16			5.45
1978			6.57			7.64

Requirement 1: Calculate the arithmetic average returns for large-company stocks and T-bills over this time period. (Do not round intermediate calculations. Enter your answers as a percentage rounded to 2 decimal places (e.g., 32.16).)

Arithmetic average returns Large company stock %

T-bills %

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

Standard deviation Large company stock %

T-bills %

Requirement 3: Calculate the observed risk premium in each year for the large-company stocks versus the T-bills. (a) What was the arithmetic 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 percentage rounded to 2 decimal places (e.g., 32.16).)

Risk premium %

(b) What was the standard deviation of the risk premium over this period? (Do not round intermediate calculations. Enter your answer as a percentage rounded to 2 decimal places (e.g., 32.16).)

Risk premium standard deviation %