18. The IIA Standards require internal auditors to have the knowledge, skills and disciplines essential to performing an audit. Which of the following is true considering the level of knowledge or skill required by the Standards? Internal auditors must 1. Be proficient in the application of auditing standards and procedures to specific situations without extensive recourse to technical research and assistance. II. Be proficient in accounting principles when auditing the financial records and reports of the organization. III. Be proficient in applying knowledge of accounting and computerized information systems to specific or potential problems. 13. An internal auditor is conducting an audit of the use of corporate credit cards. Which of the following are major audit concerns regarding the use of credit cards? 1. Segregation of duties is insufficient. II. The purchasing function is impaired. III. Cards may be used for personal benefit. IV. The company is required to make one large payment instead of many small ones