Answer:
Yield to call (YTC) = 7.64%
Step-by-step explanation:
Yield to call (YTC) = {coupon + [(call price - market price)/n]} / [(call price + market price)/2]
YTC = {135 + [(1,050 - 1,280)/5]} / [(1,050 + 1,280)/2]
YTC = 89 / 1,165 = 0.07639 = 7.64%
Yield to call is how much a bondholder will earn if the bond is actually called, and it may differ from yield to maturity since the call price is generally higher than the face value, but the yield to maturity generally is longer than the call period.