Answer:
e) 6.45%
Explanation:
Since the coupons are paid semiannually, adjust the coupon payment(PMT), the time (N) of the bond.
You can solve for cost of debt using financial calculator with the following inputs;
Maturity of the bond; N = 20 *2 = 40
Face value; FV = 1000
Coupon payment; PMT = (6%/2) *1000 = 30
Price ; PV = -(1000 - floatation cost) = -(1000 - (5%*1000) = -950
then compute semiannual interest rate; CPT I/Y = 3.224%
Convert semiannual interest rate to annual rate to find the cost of debt;
3.224% *2 = 6.45%