Finance: Interest Rates and Bond Valuation

1)Kiss Co. wants to issue new 19-year bonds for some much-needed expansion projects. The company currently has 8.3 percent coupon bonds on the market that sell for $1,019.23, make semiannual payments, and mature in 19 years. The company should set a coupon rate of ? percent on its new bonds if it wants them to sell at par.

I don't have Excel or financial calculator (I do have TI-84 Plus), so I would appreciate if the formula could be provided!

2)LimeOn Co. has 11.7 percent coupon bonds on the market with 14 years to maturity. The bonds make semiannual payments and currently sell for 107.174 percent of par. The current yield on the bonds is ? percent, the YTM is ? percent, and the effective annual yield is ? percent.