You have a balance of $9700 for your tuition on your American Express credit card. Assume that you make no more charges on the card. Also assume that American Express charges 13% APR and that each month you make only the minimum payment of 4% of the balance. Use the current balance for each part of the question. What will the balance be after 28 months? (Round your answer to the nearest cent.) At what balance do you begin making payments of $40.00 or less? (Round your answer to the nearest cent.)