RAK Co$.$ wants to issue new $20-$year bonds for some much$-$needed expansion projects. The company currently has $5\mathrm{.}7$ percent coupon bonds on the market that sell for $$1,048,$ have a par value of $$1,000,$ make semiannual payments, and mature in $20$ years.

What coupon rate should the company set on its new bonds if it wants them to sell at par?