Beacon Enterprises' bonds currently sell for $$1,280$ and have a par value of $$1,000.$ They pay a $$135$ annual coupon and have a $15-$year maturity, but they can be called in $5$ years at $$1,050.$ What is their yield to call $($YTC$)?$

$6\mathrm{.}39\%$

$9\mathrm{.}85\%$

$6\mathrm{.}80\%$

$7\mathrm{.}45\%$

$8\mathrm{.}02\%$