1 .		An annuity __________ is an annuity paid over a guaranteed number of periods.    proper   certain   present   variation
2 .		If an investment is such that the payment each period is the same, and the rate of interest does not change, the payment is called a(n) ________ .    sinking fund   installment   credit   annuity
3 .		Another name for an annuity is ________ ________.    regular payment   life insurance   sinking fund   vested principal
4 .		If an annuity is paid over an uncertain number of periods, it is called a(n) ______ annuity.    contingent   uncertain   variable   changing
5 .		For a(n) ______ annuity, payment is made at the end of the period.    vested   ordinary   uncertain   terminal
6 .		For a(n) annuity ____, payment is made at the beginning of the period.    certain   uncertain   due   variable