can you help me ask this question

Part 1 (a) What is a GST "taxable supply" and why is this concept important? (b) What is the difference between a "taxable supply", a "zero-rated supply" and an "exempt supply"? Provide an example of each. (c) When can GST input tax credits be claimed on a transaction? (d) What are the GST consequences of paying (and receiving) a deposit on supply of goods and second-hand goods? (e) Advise whether a bank would be entitled to claim input tax credits for the GST charged in respect of: . the rent it pays for leasing the buildings it uses as branches . the cost of its computer terminals. What further information would you require about the bank's operations to give your advise