Problem $12-7$ Calculating Returns and Variability $($LO$1)$

$\backslash$table$[[,$Returns$],[$Year$,$X$,$Y$,],[1,15\%,21\%,],[2,26,36,],[3,7,13,],[4,-13,-26,],[5,11,15,]]$

Using the following returns, calculate the arithmetic average returns, the variances, and the standard deviations for $x$ and $Y.($Do not round intermediate calculations. Round the percent answers to $2$ decimal places. Round the variance answers to $5$ decimal places.$)$

$\backslash$table$[[$Average returns,X$,],[$Variances$,$Y$\mathrm{.}20\%,],[$Standard deviations,,$]]$