1.How many Accounting Research Bulletins were issued?2. What was the time period the above bulletins were issued?3. What was the name of the organization that issued the bulletins?4. What was the main purpose of the Accounting Principles Board?5. How many members were on this board?6. What were the reports they issued?7. What lead to the replacement of the Accounting Principles Board?8. What organization replaced the Accounting Principles Board?9. When and why was the ""SEC"" Securities and Exchange Commission established?10. Briefly explain the following principles:a. Revenue Recognitionb. Expense Recognitionc. Full Disclosure