Use the following returns for $x$ and $Y.$

$\backslash$table$[[,$Returns$],[$Year$,$Y$,$Y$,],[1,21\mathrm{.}4\%,25\mathrm{.}2\%,],[2,-16\mathrm{.}4,-3\mathrm{.}4,],[3,9\mathrm{.}4,27\mathrm{.}2,],[4,18\mathrm{.}8,-13\mathrm{.}8,],[5,4\mathrm{.}4,31\mathrm{.}2,]]$

a$.$ Calculate the average returns for $x$ and $Y.$

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

b$.$ Calculate the variances for $x$ and $Y.$

Note: Do not round intermediate calculations and round your answers to $6$ decimal places, e$.$g$.,161616.$

c$.$ Calculate the standard deviations for $x$ and $Y.$

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