Give the correct verbs in the blankets: Future Simple or Future Continuous

IV. Give the correct verbs in the blankets: Future Simple or Future Continuous.
1. What you (do) ____________ at 9 p.m. tomorrow?
2. I (explain) ____________ that problem to you when I come back next week.
3. He (work) ____________ on the report at this time tomorrow.
4. I (call) ____________ you as soon as I meet him tonight