how do i determine when to use FV, PV, FVA, PVA, FVAD and PVAD?

Are there some key words that I should be looking for in my home work problems?

The question is below:

A lease agreement that qualifies as a finance lease calls for annual lease payments of $20,000 over a eight-year lease term (also the assets useful life), with the first payment at January 1, the beginning of the lease. The interest rate is 4%. (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.) Required: a. Complete the amortization schedule for the first two payments. b. If the lessees fiscal year is the calendar year, what would be the amount of the lease liability that the lessee would report in its balance sheet at the end of the first year? What would be the interest payable?