I'm doing research for an assignment on the flat earth and I have 5 questions to ask you.

1) If the earth is flat, does it mean that the other planets are flat as well?
2) How do you explain the sun rising and setting?
3) How do you explain the existence of time zones?
4) If you move away from the equator, different star constellations become prominent, how do you explain this?
5) What is the significance of Antarctica? Is it a giant ice wall and how do you explain the evidence that people have been there?