A firm provides the following service for its clients: 1. Preparation of a report giving advice to a client on the introduction of a new system of internal controls. 2. A report giving advice to a client on the introduction of a new system of internal controls 3. Preparation of the company's tax returns. 4. A report to management about the success of a marketing campaign. 5. A report to directors in relation to half-year financial report for a listed company. 6. An audit of a management report into the effectiveness of a company's internal control system. 7. A statement of findings to management in relation to the completeness and accuracy of its purchase ledger balances. Required For each of the above identify whether assurance services are being provided, give explanations to justify your answer. For each assurance service, identify what level of assurance will be provided and what form the opinion will take. Required For each of the above identify whether assurance services are being provided, give explanations to justify your answer. For each assurance service, identify what level of assurance will be provided and what form the opinion will take.