Answer:
a. 3.58%
Explanation:
First, find the pretax cost of debt ; the YTM.
You can solve this using a financial calculator. Input the following;
Maturity of the bond; N = 15
Face value; FV = 1,000
Price of the bond; PV = -1,075
Recurring annual coupon payments; PMT = (6%) *1000 = 60
Compute Semiannual interest rate; CPT I/Y = 5.264%
Therefore, the pretax cost of debt = 5.264%
Aftertax cost of debt = Pretax cost of debt (1-tax)
= 5.264%(1-0.32)
= 3.58%