10602 or 10603 is not correct

Question 4 g A loan of L is taken over ten years and will be repaid using the sinking fund method with equal size quarterly payments (Le. end of quarter) each of size 387.57 at a nominal annual interest rate of q% compounded quarterly. The outstanding balance for this loan after the 20'\" payment is 0.59774L. Calculate L. Give your answer rounded to the nearest whole number (Le. X). Selected Answer: [None Given] Response Feedback: Incorrect