Chamberlain Company wants to issue new $18-$year bonds for some much$-$needed expansion projects. The company currently has $6\mathrm{.}6$ percent coupon bonds on the market that sell for $$818\mathrm{.}53,$ make semiannual payments, and mature in $18$ years. What coupon rate should the company set on its new bonds if it wants them to sell at par? Assume a par value of $$1,000.$

Multiple Choice

$8\mathrm{.}90\%$

$8\mathrm{.}50\%$

$8\mathrm{.}30\%$

$4\mathrm{.}30\%$

$8\mathrm{.}60\%$