$*$SHOW WORK PLEASE$*$

You've observed the following returns on Pine Computer's stock over the past five years: $8$ percent, $-12$ percent, $14$ percent, $21$ percent, and $16$ percent. The average inflation rate over this period was $3\mathrm{.}1$ percent and the average T$-$bill rate over the period was $4\mathrm{.}1$ percent.

$(1)$ What was the average nominal return on the stock?

$0\mathrm{.}094=9\mathrm{.}4\%$

$(2)$ What was the average real return on the stock?

$0\mathrm{.}0611=6\mathrm{.}11\%$

$(3)$ What was the average nominal risk premium?

$0\mathrm{.}053=5\mathrm{.}3\%$

$(4)$ How about average real risk premium?

$2\mathrm{.}13\%$