For each of the following five questions, do not copy directly from class slides, textbooks, or related reading materials. Use your own words to answer the questions in as much detail as appropriate. 12. Explain the difference between a statute and a regulation. (10 pts) 13. What are the main differences between the Resource Conservation and Recovery Act (RCRA) and the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA)? (10 pts) 14. Why did RCRA introduce the concept of a hazardous waste manifest? ( 10 pts) 15. Name the four routes of exposure. For each route, explain what it is and provide an example of how that exposure could occur. (24 pts) 16. Explain each PPE class (A, B, C, D). For each class, explain when it would be required and provide one positive and one negative for its use. (24 pts)