i need help on all of these, please can anyone help?

1. If you deposited $2,000 today in an account that gave you 5% APR compounded interest, how much would you have in 10 years? (show work) 2. Suppose you want $5,000 in your bank account when you graduate in four years, how much would you have to invest today at 7% APR to get it? (show work) 3. If you have a bank account with a balance of $200 how long would it take you to have a balance of $400 if the bank gave you 8% APR? (show work) 4. What is the present value of $800 dollars received at the end of the next 8 years at a discount rate of 15%? (show work) 5. If an investment is paying 12% annual for the next 7 years, how much would you have if you invest $700 annually? (show work)