please show me how to work them out

Quiz chapter 3 - Pr... - Saved - Briana West EW X Share Ime Insert Draw Design Layout References Mailings Review View Help Be careful--files from the Internet can contain viruses. Unless you need to edit, it's safer to stay in TED VIEW Protected View Enable Editing Name: period: 1 - A company estimates that it will need $64,000 in 16years to replace a computer. If it establishes a sinking fund by making fixed monthly payments into an account paying 2.5% compounded monthly, how much should each payment be? 2 - How long will it take $10,00.00 to grow to $12,000.00 if it is invested at a rate of 6% compounded monthly? 3 - A monthly house mortgage payment is $1684.00. If this month's portion allotted to the principalis $1225.51, what is the amount for this months interest