Solved by a verified expert:Question 2Discuss the role of the Institutional Review Board (IRB) and the Institutional Animal Care and Use Committee (IACUC) in ensuring the protection of human and animal test subjects. What are the main criteria the IRB and IACUC use to evaluate the ethics of a research protocol? Do you feel that these criteria are sufficient? Your response should be at least 200 words in length.ReferencePhalen, R. F., & Phalen, R. N. (2013). Introduction to air pollution science: A public health perspective. Burlington, MA: Jones & Bartlett LearningQuestion 3Compare and contrast command and control against incentive-based regulatory philosophy. How would the corporate ethics of a company that would be better regulated under a command and control differ from those of a company that would be more effectively regulated by an incentive-based approach? Your response should be at least 200 words in length.ReferencePhalen, R. F., & Phalen, R. N. (2013). Introduction to air pollution science: A public health perspective. Burlington, MA: Jones & Bartlett LearningQuestion 4Discuss the basic elements of a professional code of ethics. Compare these elements to the code of ethics for your employer or current profession. What elements would you add, and why? (If you do not currently have an employer, research a code for the profession or employer you wish to have. If your current employer/profession does not have a code of ethics, research one for a similar field or employer.) Your response should be at least 200 words in length.ReferencePhalen, R. F., & Phalen, R. N. (2013). Introduction to air pollution science: A public health perspective. Burlington, MA: Jones & Bartlett Learning