We begin by considering a 6-year bond issued by Greco Corp. The bond was initially sold to investors 4 years ago as a 10-year bond. At the time it was sold at par. The face value for each bond was $1000 and the annual coupon rate was set at a fixed rate of 3.6% (coupons are paid semi-annually). You are told that currently the required return, or yield to maturity (YTM), for this bond is 4.0% APR with semiannual compounding. Discuss qualitatively how you would determine the appropriate YTM.