Your portfolio is comprised of $30\%$ of stock X$,40\%$ of stock Y$,$ and $30\%$ of stock Z$.$ Stock X has a beta of $\mathrm{.}8,$ stock $Y$ has a beta of $1\mathrm{.}2,$ and stock $Z$ has a beta of $2\mathrm{.}8.$ What is the beta of your portfolio?

$1\mathrm{.}01$

$1\mathrm{.}27$

$1\mathrm{.}38$

$1\mathrm{.}56$

$1\mathrm{.}69$