How many levels of government are there in Australia? What are they? What do they do?

There are many articles on this topic. Since the tutors here are in the US and Canada, these websites are your best bet.

https://www.google.com/search?q=levels+of+government+in+australia&oq=levels+of+government+in+australia&aqs=chrome..69i57j69i60.1080j0j7&sourceid=chrome&ie=UTF-8