For each of the following $$1,000-$par$-$value bonds, assuming annual interest payment and a $21\%$ tax rate, calculate the after$-$tax cost of debt.

Bond Life $($years$)$ Underwriting fee Discount $()$ Coupon Interest Rate

or premium $(+)$

A $20$ $$25-$$$209\%$

B $1640+1010$

C $1530-1512$

D $2515$ par $9$

E $2220-6011$

Please show your work.