Chamberlain Company wants to issue new $18-$year bonds for some much$-$needed expansion projects. The company currently has $9\mathrm{.}4$ percent coupon bonds on the market that sell for $$1,243\mathrm{.}49,$ make semiannual payments, and mature in $18$ years. What coupon rate should the company set on its new bonds if it wants them to sell at par? Assume a par value of $$1,000.$

Multiple Choice

$7\mathrm{.}30\%$

$3\mathrm{.}50\%$

$6\mathrm{.}70\%$

$6\mathrm{.}90\%$

$7\mathrm{.}00\%$