please help me do this (no financial calculator, just show me the formulas)

Uliana Company wants to issue new 19-year bonds for some much-needed expansion projects. The company currently has 9.3 percent coupon bonds on the market that sell for $1,133, make semiannual payments, have a par value of $1,000, and mature in 19 years. What coupon rate should the company set on its new bonds if it wants them to sell at par?