Problem:
Dominique LeBlanc is the owner of a new ten-year $ 50000 8% par-value bond with a Bermuda option and annual coupons. Allowable call dates are at the ends of years 6 through 10, and the call premium at the end of each year is a constant $300. Dominique purchased the bond for $ 51248.
Required:
Question: Find the lowest yield that Dominique may receive during the period she holds the bond as well as the highest.
Note: Please provide through step by step calculations.