A new car is $20,000. Assume that an individual makes a down payment of 25% toward the purchase of the car and secures financing for the balance at the rate of 5%/year compounded monthly. (Round your answers to the nearest cent.)

(a) What monthly payment will she be required to make if the car is financed over a period of 36 months? Over a period of 72 months?

36 months	$
72 months	$

(b) What will the interest charges be if she elects the 36-month plan? The 72-month plan?

36-month plan	$
72-month plan	$