After visiting several automobile dealerships, Richard selects the car he wants. He likes its $12,000 price, but financing through the dealer is no bargain. He has $2,400 cash for a down payment, so he needs a loan of $9,600. in shopping ot severaf banks for an installment loan, ho leorns that interest on most automobile loans is quoted at add-on rates. That is, during the afe of the loan, interest is pald on the full amount borrowed even though a portion of the principal has been paid bock. Richard borrows $9,600 for a period of five years at an add-on interest rate of 13 percent. a. What is the total interest on Richard's loan? b. What is the total cost of the car? c. What is the monthly payment