Answer:
7.98 %
Step-by-step explanation:
Debt is any source that requires repayment of a fixed amount as interest to the holder of the source of finance.
Since we are given the Yield, we can safely use that to calculate the After tax cost of debt as follows
After-tax cost of debt = Interest x ( 1 - tax rate)
= 11.40 % x ( 1 - 0.30)
= 7.98 %