Chamberlain Company wants to issue new $15-$year bonds for some much$-$needed expansion projects. The company currently has $10\mathrm{.}0$ percent coupon bonds on the market that sell for $$1,015\mathrm{.}55,$ make semiannual payments, and mature in $15$ years. What coupon rate should the company set on its new bonds if it wants them to sell at par? Assume a par value of $$1,000.$

Multiple Choice

$9\mathrm{.}80\%$

$4\mathrm{.}90\%$

$10\mathrm{.}10\%$

$9\mathrm{.}70\%$

$9\mathrm{.}50\%$