Par. (4 points cach) Circle the best model for cach situation below: 1. The lab director does a lab test together with his assistant. The assistant always has to write the protocol during the lab test. 2. To conduct an exam, one student and at least one instructor are ?, ? 3. A mechanic does a car service. During that service, it might be necessary to change the break unit. 4. A teacher is conducting an interview with a student. In the course of that interview, the teacher always has to grade the 5. A person goes to lunch. In the course of that it might be necessary that the person withdraws cash from an ATM. Part 2. (4 points each) Short Answer/Fill in the blank/Multiple Choice. 6. A(n) is an external agent that interacts with the system, exchanges information with the system, or a role played by a user. 7. The use case relationship is used when one case always involves the steps of another. Par. (4 points cach) Circle the best model for cach situation below: 1. The lab director does a lab test together with his assistant. The assistant always has to write the protocol during the lab test. 2. To conduct an exam, one student and at least one instructor are ?, ? 3. A mechanic does a car service. During that service, it might be necessary to change the break unit. 4. A teacher is conducting an interview with a student. In the course of that interview, the teacher always has to grade the 5. A person goes to lunch. In the course of that it might be necessary that the person withdraws cash from an ATM. Part 2. (4 points each) Short Answer/Fill in the blank/Multiple Choice. 6. A(n) is an external agent that interacts with the system, exchanges information with the system, or a role played by a user. 7. The use case relationship is used when one case always involves the steps of another