Problem $10-10$ Calculating Real Returns and Risk Premiums

You've observed the following returns on SkyNet Data Corporation's stock over the past five years: $20$ percent, $-12$ percent, $17$ percent, $20$ percent, and $10$ percent. Suppose the average inflation rate over this period was $1\mathrm{.}7$ percent and the average $T-$bill rate over the period was $4\mathrm{.}6$ percent.

a$.$ What was the average real return on the company's stock? $($Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

b$.$ What was the average nominal risk premium on the company's stock? $($Do not round intermediate calculations and enter your answer as a percent rounded to $1$ decimal place, e$.$g$.,32\mathrm{.}1.)$

Answer is complete but not entirely correct.

$\backslash$table$[[$a$.$ Average real return,$7\mathrm{.}78,\%$