How did they arrive with the before-tax cost of debt and the after-tax cost of debt in the table located below from the following information. Please show all workings.

The company will contract a new loan in the sum of $2,000,000 that is secured by machinery and the loan has an interest rate of 6 percent. Healthy Options has also issued 4,000 new bond issues with an 8 percent coupon, paid semiannually, and which matures in 10 years. The bonds were sold at par, and incurred floatation cost of 2 percent per issue.

Loan amount	2000000
Interest rate	6%
Par Value	1000
Coupon rate	8%
Time to maturity	10
Payment frequency	2
Bond price	980
YTM	4.15%
No. of bonds	4000
Debt raised	3920000
Market Value of Debt (MVd)	5920000
% Debt	32.49%
Before tax Cost of debt	4.77%
After tax Cost of debt	3.58%