1. In your own words, kindly explain the Audit Trail, its importance in AIS and give an example of a complete audit trail in your personal life setting. 2. What are the types of files in a system and define each. 3. Differentiate batch processing and real-time processing. Explain the advantages and disadvantages of using batch processing in cash-recording transactions. 4. Explain the different coding schemes and the importance of such in the audit trail concept.