1. What is the rebate (Rb) on a loan of $2,000 at 5% annual interest if the borrower decides to pay it all after 10 payments of the 24-payment maturity time?
2. Find the monthly payment of a $4,000 loan for 48 months at an add-on 9% annual interest. Also, find the final balance if this loan is to be paid off at the 30th payment (assuming that 29 payments have been made).