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.

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$.,32\mathrm{.}16.$