Your portfolio is invested with $70\%$ of your money in Stock $x$ and the remaining in Stock

$Y.$ Stock $x$ has an expected return of $6\%$ and a standard deviation of $10\%.$ Stock $Y$ has an

expected return of $25\%$ and a standard deviation of $35\%.$ The correlation between Stock

$x$ and Stock $Y$ is $20\%.$ What is the standard deviation of your portfolio?

$13\mathrm{.}19\%$

$17\mathrm{.}50\%$

$11\mathrm{.}70\%$

$13\mathrm{.}73\%$

$12\mathrm{.}62\%$