Answer:
a) 8.36%
b) 5.43%
Step-by-step explanation:
to find the pretax cost of debt we must find the yield to maturity:
YTM = {coupon + [(face value - market value) / n]} / [(face value + market value) / 2]
YTM = {45 + [(1,000 - 1,070) / 40]} / [(1,000 + 1,070) / 2] = 43.25 / 1,035 = 0.04178 x 2 = 0.08357 = 8.36%
after tax cost of debt = 8.36% x (1 - 35%) = 8.36% x 0.65 = 5.43%