How the principles of precedent were applied in the case of Mabo v Queensland (no.2) [1992] HCA 23 and the outcomes that ensued?

 Q2: Explain the hierarchy of the Victorian courts and the appeal process using the Pell case as an example. You need to give more information about 3 cases (including the citations): DPP v George Pell [2019] VCC 260, George Pell v The Queen [2019] VSCA 186, and George Pell v The Queen [2020] HCA 12. And explain the legal issues in each case and how they were decided.

 Q3: Resolve the conflicts between Australian statute and Australian common law with reference to the hierarchy of the sources of law in the Australian legal system, and explain how this was relevant in the case of ACCC v Jetstar Airways Pty Ltd [2019] FCA 797. (considering Australian Consumer Law Section 18)

 Q4: Resolve the conflicts between pieces of Australian statute with reference to the hierarchy of the sources of law in the Australian legal system, and explain how this was relevant in the case of  McBain v State of Victoria [2000] FCA 1009. (considering Section 109 of the Constitution)

 Request: For better understanding, please give detailed responses to each question without being too brief.