Consider the following table for a period of six years: Returns Year Large-Company Stocks 1 123456 -15.79% -26.80 37.45 24.15 -7.60 6.79 U.S. Treasury Bills 7.51% 8.10 a-1. Arithmetic average return a-2. Standard deviation 6.09 6.17 5.56 7.97 a-1. Calculate the arithmetic average returns for large-company stocks and T-bills over this time period. Note: Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16. a-2. Calculate the standard deviation of the returns for large-company stocks and T-bills over this time period. Note: Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16. Large-company stocks % % T-bills % % Calculate the observed risk premium in each year for the large-company stocks versus the T-bills. b-1. What was the arithmetic average risk premium over this period? Note: A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter you