es Consider the following table for a period of six years: Year 1 223255PS 6 Returns Large-Company Stocks -15.59% -26.74 37.41 24.11 -7.52 6.75 U.S. Treasury Bills 7.47% a-1. Arithmetic average return a-2. Standard deviation 8.08 6.05 5.97 5.54 7.91 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 de a-2. Calculate the standard deviation of the returns for large-company stocks and T-bills over this time Note: Do not round intermediate calculations and enter your answers as a percent rounded to 2 de Large-company stocks + % % T-bills % %