Seether Co. wants to issue new 17-year bonds for some much-needed expansion projects. The company currently has 6.8 percent coupon bonds on the market that sell for $840.71, make semiannual payments, and mature in 17 years. What coupon rate should the company set on its new bonds if it wants them to sell at par?

Could you please explain the process also . Would be great if you could show the value as I am trying to solve from financial calculator . Appreciate it