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

$\backslash$table$[[,$Returns$],[$Year$,x,Y,],[1,21\mathrm{.}8\%,26\mathrm{.}4\%,],[2,-16\mathrm{.}8,-3\mathrm{.}8,],[3,9\mathrm{.}8,28\mathrm{.}4,],[4,19\mathrm{.}6,-14\mathrm{.}6,],[5,4\mathrm{.}8,32\mathrm{.}4,]]$

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