Assume these are the stock market and Treasury bill returns for a $5-$year period:

$\backslash$table$[[$Year$,$Stock Market Return $(\%),\backslash$table$[[$T$-$Bill$],[$Return$],[(\%)]]],[2016,33\mathrm{.}70,0\mathrm{.}13],[2017,13\mathrm{.}30,0\mathrm{.}13],[2018,-3\mathrm{.}60,0\mathrm{.}13],[2019,14\mathrm{.}70,0\mathrm{.}08],[2020,24\mathrm{.}20,0\mathrm{.}10]]$

Required:

a$.$ What was the risk premium on common stock in each year?

b$.$ What was the average risk premium?

c$.$ What was the standard deviation of the risk premium? $($Ignore that the estimation is from a sample of data.$)$

Complete this question by entering your answers in the tabs below.

Required $B$

Required $C$

What was the risk premium on common stock in each year?

Note: Do not round intermediate calculations. Enter your answers as a percent rounded to $2$ decimal places. Negative values should be entered with a negative sign.

$\backslash$table$[[$Year$,$Risk Premium$],[2016,,\%$