You$$ve observed the following returns on Pine Computer$$s stock over the past five years: $24\mathrm{.}3$ percent, $13\mathrm{.}2$ percent, $29\mathrm{.}4$ percent, $2\mathrm{.}1$ percent, and $21\mathrm{.}1$ percent.

What was the arithmetic average return on the stock over this five$-$year period?

Note: 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 variance of the returns over this period?

Note: Do not round intermediate calculations and round your answer to $6$ decimal places, e$.$g$.,\mathrm{.}161616.$

What was the standard deviation of the returns over this period?

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