The Pioneer Petroleum Corporation has a bond outstanding with an $70 annual interest payment, a market price of $810, and a maturity date in five years. Assume the par value of the bond is $1,000.

Find the following: (Use the approximation formula to compute the approximate yield to maturity and use a calculator or Excel to compute the exact yield to maturity. Do not round intermediate calculations. Input your answers as a percent rounded to 2 decimal places.)

a. Coupon rate %

b. Current yield %

c-1. Approximate yield to maturity %

c-2. Exact yield to maturity %