Consider the following statements. I. Objects with large amounts of charge have bigger electric fields than do objects with small amounts of charge; II. Electrons have a positive charge; III. Like charges repel. Which statement(s) is/are true? 1. None is true. 2. I only 3. II and III only 4. I and II only 5. I and III only 6. III only 7. All are true. 8. II only