What made Aristarchus (about 2300 years ago in Ancient Greece) suggest that Earth orbits the Sun?

I don’t understand this Astronomy question and need help to study.Each question can be answered in 1 paragraph itself. I have also attached the study notes along with the questions you need to answer……..q4: What made Aristarchus (about 2300 years ago in Ancient Greece) suggest that Earth orbits the Sun? Explain.q5: a) What observations made the Ancient Greek philosopher Aristotle suggest a spherical Earth in the center of the universe? How did he decide on planet’s orbits and their order?b) How did Ptolemy (about 1,900 years ago) modify the simple Geocentric model, and why did he do so? Was the model successful, and what makes you think so? Explain clearly with several sentences.q7: What was not quite correct in the Heliocentric model of Copernicus? Why did he make a mistake, in your opinion? Explain your reasoning.q17: Suppose you could travel back in time and show the Ancient Greeks one observation from modern times (and the tools to observe it). If you wanted to convince them to accept the Sun-centered model, what observation will you choose to show them? Do you think you would convince them?
Requirements: 1 paragraph for each question

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Approximately 250 words