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 60 months? Over a period of 72 months? 60months72months$$ (b) What will the interest charges be if she elects the 60-month plan? The 72 -month plan? 60-month plan $ 72-month plan $ 12 years at an interest rate of 6.1%/ year compounded quarterly, find the required quarterly payment. (Round your answer to the nearest 2