1. One person has a debt of ( 10,000 TL. This debt will be paid in 10 years with 3-month equal installments. The applied interest rate is 6-months 7.5% compounded monthly maturity. However, this person has difficulty repaying the debt. Therefore, his debt is restructured at the beginning of the 5th year of the payment. According to the new debt repayment plan, the interest rate for the remaining debt is 3-months 4.5% compounded monthly maturity. This remaining debt will be paid in 10 years with fixed decreasing installments per year. The first installment is 15% of the remaining debt. a) Calculate the equal installment amount in the first debt payment plan. (15 P) b) Find the remaining debt at the beginning of the 5th year (10 P) c) Find the fixed decreasing amount (G) in the second debt repayment schedule. (25 p)