Consider the following table for a period of six years.

Returns

Year

$1973$

$1974$

$1975$

$1976$

$1977$

$1978$

Large$-$Company Stocks

$14\mathrm{.}69\%$

$26\mathrm{.}47$

$37\mathrm{.}23$

$23\mathrm{.}93$

$-7\mathrm{.}166\mathrm{.}57$

U$.$S$.$ Treasury Bills

$6\mathrm{.}93\%$

$8\mathrm{.}00$

$5\mathrm{.}80$

$5\mathrm{.}08$

$5\mathrm{.}12$

$7\mathrm{.}18$

$$Calculate the arithmetic average returns for large$-$company stocks and T$-$bills over this time period.$$Note: Do not round intermediate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

$$Calculate the standard deviation of the returns for large$-$company stocks and T$-$bills over this time period.$$Note: Do not round intermediate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

$$Calculate the observed risk premium in each year for the large$-$company stocks versus the T$-$bills. What was the arithmetic average risk premium over this period?$$Note: A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

$$What was the standard deviation of the risk premium over this period?$$Note: Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

@ Answer is complete but not entirely correct.

$$Large company stock$$T$-$bills

$$Large company stock$$T$-$bills

$$Risk premium

$$Standard deviation

$3\mathrm{.}24$ V

$\%$

$6\mathrm{.}35\%$

$24\mathrm{.}11\%$

$1\mathrm{.}190$

$\%$

$13\mathrm{.}19\%$

$24\mathrm{.}92\%$