Sea Snake Industries' $7\mathrm{.}0\%$ bonds currently sell for $$670\mathrm{.}54.$ They mature in $40$ years

and have a par value of $$1,000.$ If these bonds pay interest semiannually, what is the

yield to maturity?

$9\mathrm{.}89\%$

$10\mathrm{.}53\%$

$9\mathrm{.}58\%$

$11\mathrm{.}16\%$

$10\mathrm{.}84\%$