A streaming pipeline must aggregate by business event time and account for records that arrive after the usual window completion. Which two configuration decisions directly address these requirements? Select 2 answers.

1. Increase worker count and assume it resolves all out-of-order event semantics.
2. Assign timestamps representing when the underlying events occurred.
3. Treat the watermark as a guarantee that no earlier event can ever arrive.
4. Use arrival time for every event and discard the source timestamp.
5. Define allowed lateness and trigger behavior for the windows.