I was not given 5-6 information and am hoping it can be solved without it

The student in Problem 5-6 wanted to buy a car costing $24,000 from a dealer offering 0% down and financing at 12% interest over 60 months. Her disposable income is $500 per month. What monthly interest rate can she afford? What effective annual rate is this? Insurance on this car will be $50 per month more than she had planned, which will leave her with only $450 per month for her car payment. Now what monthly interest rate can she afford? What effective annual rate is this