Please answer all these questions

1-Explain the relationship among assurance service, attestation service and audit service?

2-What are the four primary causes of information risk and how to reduce the information risk advantages and disadvantages of each method?

3-Explain what is meant by: degree of correspondence between information

and established criteria?

4-What are the similarities and differences between: audit of financial statements, compliance audit and operational audit?

5-What is internal audit? Your discussion should include the purpose/objectives of internal audit, how it is executed and its importance in an audit environment.

6-. What is the difference between internal and external audit?