Your sister pays $350 per month to Key Bank. She borrowed money to purchase a new car. If Key Bank is charging her 10% p.a. and the loan is to be paid off in 5 years, how much did she borrow. By the way, the payment is with drawn from her account on the first of eac month. a. $20,852 b. $16,610 c. $15,772 d. $21,000