For each of the following situations involving annuities, solve for the unknown. Assume that interest is compounded annually and that all annuity amounts are received at the end of each period. (i = interest rate, and n = number of years) (FV of $1, PV of $1, FVA of $1, PVA of $1, FVAD of $1 and PVAD of $1) (Use appropriate factor(s) from the tables provided. Round your final answers to nearest whole dollar amount.)

Present Value| Annuity Amount | i= | n=

1. ? 2800 8% 5

2. 483233 130000 ? 4

3. 717747 160000 9% ?

4. 550000 81690 ? 8

5. 225000 ? 10% 4

? is what I need help with thanks