Answer:
aftertax cost of debt =5.63%
Step-by-step explanation:
fisrt we need to know the formula for the yield to maturity
Yield to maturity (YTM)
YTM= ( I+(F-P)/n ) / ( 0.6P +0.4F)
YTM= (9 + ( 100-102.3) / 11 ) / (0.6*102.3 + 0.4*100)
YTM= 0.0867
YTM= 8.67%
after taxes we have...
8.67% (1-0.35%)
=0.0563
=5.63%