From the PT "EKA PRASETYA" debt repayment table, it can be seen that the principal installments paid in the second year are Rp 2,508,363,843, - while the principal installments paid in the 5th year are Rp 4,121,322,061, - If the remaining debt in the year 6th is IDR 29,928,906.85, - From this case determine:

A. Annual annuity paid by PT "EKA PRASETYA" and total paid until the debt is paid off.

B. The interest rate charged to PT "EKA PRASETYA" and the length of the loan period. As well as calculating the borrowed capital by PT "EKA PRASETYA".

C. If the loan capital is paid in bulk and interest is doubled each month, how much will be paid in total.

D. If the interest rate above is the average interest, what percentage of the effective interest rate.