Can you help me with this question: 18. Consider a bond with a coupon rate of 5%, face value $100,000 and twenty year maturity. a) What is its price

Can you help me with this question:

18. Consider a bond with a coupon rate of 5%, face value $100,000 and twenty year maturity. 

             a) What is its price if the yield-to-maturity is 5%? What about 6%? 4%? Calculate these as explained in #17, or use the bond formula in the Lecture Notes.

             b) Repeat the three parts of a) but for a thirty-year maturity.