Suppose that after graduation that Sarah must pay back $70,000 in student loans a that she has 15 years to do so. She has a direct subsidized undergraduate loan with interest rate of 4.29%, compounded monthly and this interest starts to accrue t e month after she graduates. The terms of her loan are such that she will m a payment at the beginning of each month for 15 years, starting with the num graduates. Thus, she will make a total of 15 times 12 = 180 payments