please answer / thank you

1- Why is it expected that auditing the financial statements of a client after providing consulting on financial reporting matters to it would likely harm the independence of the auditor involved? 2- Is it allowed for an audit firm to base its requested audit fee on its name and reputation, as compared to basing it on the number of working hours expected on the client? Briefly discuss. 3- If the client's audit committee determines the audit fee and appoints the audit firm, how would this particularly support the auditor's independence