Match the following terms with their definitions.

$\backslash$table$[[1.$ Beginning as well as ending dates,$],[2.$ Stream of payments,$],[3.$ Paid at beginning,$],[4.$ Beginning as well as ending dates, not fixed,$],[5.$ Paid at end,$],[6.$ Need to invest today to receive the stream,$],[7.$ Set aside payments to build to future amount,$],[8.$ Sum of series of payments,$]]$