When taking an agile approach, how are requirements completed?

Trey are completed continudusy throughout the projact, starting at the highest level and then refined as the work in proratized.

Before the dowelopment team's sprine a "fequirements spront" is completed drowing trom the information in the backlog.

The releases are defined up front and the detailed requirements are completed befoee developenent starts

Firs, the busiess case is defred followed then by process modeling and then on to the requirements. Once requiremens are completed. they are handed off te the developiment taant.