You want to save money on the down payment on your flat loan. You are planning to save for the next 5 years. During a year, you can accumulate a certain amount of money that you can invest at the end of the year for 3% annual interest rate. The present value of the property to be purchased is 70000. Prices for such flats rise by 12% per year. You want to buy a flat after 5 years with a down payment of 15% of its value. The administrative costs of purchasing are currently 1000, and increase by 5% each year. How much do you have to save each year to have enough money to cover down payment and administrative costs after 5 years, given that now is the beginning of the year? What if you can invest in the end of each month and interest is to be calculated monthly, how much do you have to save each month?