Kilgore Natural Gas has a $1,000 par value bond outstanding that pays 16 percent annual interest. The current yield to maturity on such bonds in the market is 14 percent. Use Appendix B and Appendix D for an approximate answer but calculate your final answer using the formula and financial calculator methods. Compute the price of the bonds for these maturity dates: (Do not round intermediate calculations. Round your final answers to 2 decimal places. Assume interest payments are annual.) a)30 years b)20 years c)4 years?