A Tesla dealer sold car on September 30th, 2020, for the amount of $80,000 with a 25% down payment. The buyer took a 15-year loan with an effective interest rate of 7% per year. The buyer intends to pay off the loan owed in yearly payments starting on September 30, 2022. (a) How much of the loan will still be owed after the payment due on September 30, 20242 (b) Solve the same problem by separating the interest and the principal amounts