Suppose we have the following returns for large$-$company stocks and Treasury bills over

a six$-$year period:

a$.$ Calculate the arithmetic average returns for large$-$company stocks and T$-$bills over

this period. $($Do not round intermediate calculations and enter your answers as a

percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

b$.$ Calculate the standard deviation of the returns for large$-$company stocks and T$-$bills

over this period. $($Do not round intermediate calculations and enter your answers

as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

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? $($A negative

answer should be indicated by a minus sign. Do not round intermediate

calculations and enter your answer as a percent rounded to $2$ decimal places,

e$.$g$.,32\mathrm{.}16.)$

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 and enter your answer as a

percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$