Seether Co. wants to issue new 20-year bonds for some much-needed expansion projects.

Seether Co. wants to issue new 20-year bonds for some much-needed expansion projects. The company currently has 8 percent coupon bonds on the market that sell for $930, make semiannual payments, and mature in 20 years. The company should set a coupon rate of what percent on its new bonds if it wants them to sell at par.?