Suppose that a firm is looking to buy a competitor and wants to finance the purchase by issuing new 21- year bonds. The company's current outstanding bonds sell for $ 1,136, pay a 9.6 percent coupon, make semiannual payments, mature in 21 years, and have a par value of $1,000. If the company wants to sell its new bonds at par, what coupon rate should it pay? ( Hint: In order to get an investor to buy the new bond, it must provide the investor with at least as much return as the existing bond.) (Express your final answer as a percent rounded to 2 decimal placese.g., 12.82.)