You are the audit partner of Integrity Chartered Accountants ("ICA"), workhg on the audit of Darwin Tourist Buses ("DTB") for the 2022 financial year. DTB provides luxury bus trips around Australia, including interstate capital city travel and conference and holiday packages. The net profit before tax of DTB for the 2022 financial year is $15M, while net assets total $230M. You are reviewing the 2022 audit working papers and note that the senior auditor has documented several situations that may lead to a breach of independence for ICA. Situation 1 It has been documented that the DTB Financial Controller has gifted the three audit team members with two free luxury holiday packages each. The audit manager has concluded that the key threat to independence in Situation 1 is self-interest'. Situation 2 The audit team has documented that DTB intends to launch a new customer loyalty program. The CFO of DTB has guaranteed that if the audit team convince ICA and five of its biggest clients to sign an exclusive corporate travel arrangement with DTB, the audit team will receive immediate platinum status (typically requiring a customer to have accumulated one million points), giving them a host of benefits. The audit manager has concluded that the key threat to independence in Situation 2 is 'familiarity' Situation 3 The audit team has noted that ICA has proposed a proposal to DTB to provide consulting services. The CFO of DTB has told the audit team that if they do not remove comments in the audit summary review memorandum to be provided to the audit committee about a weakness in the revenue and receivables process. he will not award ICA the consulting work. The audit manager has concluded that the key threat to independence in Situation 3 is advocacy' REQUIRED: a. Identify and explain the five fundamental principles of the Code of Ethics for Professional Accountants. (4 marks) b. Explain whether the audit manager has correctly identified the key potential threat to independence for each of Situations 1,2 and 3 above. Justify your answer. ( 6 marks)