You've observed the following returns on Pine Computer's stock over the past five years: $-27$ percent, $15$ percent, $33$ percent, $3$ percent, and $22$ percent.

a$.$ What was the arithmetic average return on the stock over this five$-$year perlod?

Note: Do not round Intermedlate calculatlons and enter your answer as a percent rounded to $2$ declmal places, e$.$g$.,32\mathrm{.}16.$

b$.$ What was the varlance of the returns over thls perlod?

Note: Do not round Intermedlate calculatlons and round your answer to $6$ declmal places, e$.$g$.,\mathrm{.}161616.$

c$.$ What was the standard deviation of the returns over this perlod?

Note: Do not round Intermedlate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

$\backslash$table$[[$a$.$ Arithmetic average return,,$\%$