Problem:
A 20-year maturity, 8.2% coupon bond paying coupons semiannually is callable in seven years at a call price of $1,110. The bond currently sells at a yield to maturity of 7.2% (3.60% per half-year).
Required:
Question 1: What is the yield to call?
Question 2: What is the yield to call if the call price is only $1,060?
Question 3: What is the yield to call if the call price is $1,110 but the bond can be called in four years instead of seven years?
Note: Can someone please give me a step by step solution?