Answer:
a)
Pre-tax Cost Of Debt = 7.64%
b)
Tax Rate = 40%
Post Tax cost of debt = 7.33% * (1 - 40%) = 4.58%
So Post Tax cost of Debt = 4.58%
Explanation:
Bond Par Value = 12,900,000
Bond Market Price 93% of face value = 11,997,000
Years To maturity = 5.00
Annual Interest 5.9% = 761,100
Formula = [Annual Interest + (Par Value-Market Value) / Years to Maturity] / [(Par value+Market Price*2)/3]
Year To Maturity = [761100 + (12900000 - 11997000) / 5] / (12900000 + 2*11997000) / 3
Year to maturity = 7.33%