ASAP please

Bright Crops Corp. issued a 30-year, 8 percent semiannual coupon bond 10 years ago. The bond currently sells for 90 percent of its face value. What is the after- tax cost of debt if the company's tax rate is 21 percent? 5.38 percent 7.18 percent 6.32 percent 4.75 percent 9.09 percent Today, you borrowed $4,250 on your credit card to purchase some furniture. The interest rate is 14.9 percent, compounded monthly. How long will it take you to pay off this debt assuming that you do not charge anything else and make regular monthly payments of $100? OA) 6.93 years B) 7.23 years C) 5.07 years D) 10.31 years E) 8.87 years You are borrowing $31,000 to buy a car. The terms of the loan call for monthly payments for five years at 6 percent interest. What is the amount of each payment? O A) $632.28 B) $391.40 C) $599.32 D) $444.64 O E) $401.12