4. A car dealer advertises the sale of a car model for a cash price of P1,000,000. If purchased on installment, the downpayment is 20% and the balance payable in 3 years equal monthly installments at...

Extracted text: 4. A car dealer advertises the sale of a car model for a cash price of P1,000,000. If purchased on installment, the downpayment is 20% and the balance payable in 3 years equal monthly installments at an interest of 1.8% per month, a) how much will be the required monthly payment and b) what will be the accumulated amount of these payments invested bi-monthly for 1year.