How much money should be saved on 1^st February , 1995 on a savings with an interest rate of 8% compounded every 6 months) so Every 6 months you can withdraw IDR 5,000,000 starting on the 1^st February 2005 to 1^st August 2015? (Hint : IDR 34,295,562)

Ana wants to have Rp. 75,000,000 from a deposit with an interest rate of 8% given every 3 months by doing deposit in the amount of Rp. 2,000,000, - every 3 months.

1. How many times has he made the full deposit? (Hint : 27 times)
2. What additional deposit value did he make to complete the money value will be IDR 75,000,000 if the additional deposit is made was done at the last deposit? (Hint : IDR 2,840,764)
3. What is the additional deposit value if it is made 3 months after the deposit last? (Hint : IDR 2,897,579)