A person is interested in constructing a portfolio. Two stocks are being considered. Let x $=$ percent return for an investment in stock $1,$ and y $=$ percent return for an investment in stock $2.$ The expected return and standard deviation for stock $1$ are $6\mathrm{.}28\%$ and $3\mathrm{.}9\%.$ The expected return and standard deviation for stock $2$ are $3\mathrm{.}39\%$ and $1\mathrm{.}7\%.$ The correlation between these two stocks is $-0\mathrm{.}43.$

Calculate the covariance between stock $1$ and stock $2.$

Group of answer choices

$-2\mathrm{.}8509$

$6\mathrm{.}6300$

$-9\mathrm{.}1544$

$-18\mathrm{.}9015$