Please provide detailed answers for the below questions, short answers will not be accepted.

1. What is the role of management accounting, financial accounting, internal auditing and external auditing?
2. What has weakened the ability of external auditors to conduct objectives audits?
3. Give examples of how firms can manipulate earning. Give examples of how firms commit accounting fraud.
4. Smoothing accounting earnings, from year to year, could make the stock price less volatile (i.e, less risky). So, is smoothing or managing earning good or bad for shareholders? Compare and contrast the advantages and disadvantages of smoothing earning.