You ve observed the following returns on Yamauchi Corporation's stock over the past five years: $-24\mathrm{.}6$ percent, $13\mathrm{.}4$ percent, $29\mathrm{.}8$ percent, $22$ percent, and $21\mathrm{.}2$ percent.

a$.$ What was the arithmetic average return on the stock over this five$-$year period? $($Do not round Intermedlate colculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

b$.$ What was the variance of the returns over this period? $($Do not round Intermedlate calculations and round your answer to $6$ decimal places, e$.$g$.,32161616.)$

c$.$ What was the standard deviation of the returns over this period? $($Do not round Intermedlate calculations and enter your answer as a percent rounded to $2$ declmal places, e$.$e$.,32\mathrm{.}10.)$

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