4. distinguish between the legal concept of actually foreseen third party users and reasonably foreseeably third-party users. How does each concept establish the basis for an auditor's legal liability to third parties? 6. Explain the legal basis for a cause of action against an auditor. What are the defenses available to the auditor to rebut such charges? How does adherence to the ethical standards of the accounting profession relate to these defenses? 19. Answer the following with respect to deficiencies in ICFR. a. How should a SEC registrant evaluate whether a deficiency in ICFR is a material weakness? b. Why should SEC registrants document why a significant deficiency in ICFR is not a material weakness