A loan of IDR 500,000,000 will be due in 4 years and must be repaid with repayment funds. If the loan bears interest the simple method is 10% p.a. is paid out every year and the payment of settlement funds can earn 9% p.a. calculated quarterly, count: a. Annual payment amount b. Repayment amount after 3 years c. Book value of loan after 3 years