explain what is the best estimate of nominal interest rate

ayrets (4-21 Absalom Energy's 14% coupon rate, semiannual payment, $1,000 par value bonds that Yield to nature in 30 years are callable 5 years from now at a price of $1,050. The bonds sell at a Market price of $1,353.54, and the yield curve is flat. Assuming that interest rates in the economy Rates are expected to remain at their current level, what is the best estimate of the nominal interest rate on new bonds