Building models is an important part of the follow-up after an intelview with customers and different stakeholders True False Question 16 (3 points) When describing an external event, there is no need to worry about the person or thing causing the event True False Activity diagrams are not helpful in developing system sequence diagrams (SSDs) True False Question 24 (3 points) Information for Use Case Descriptions is primarily derived from System Sequence Diagrams True False Question 25 (3 points) In a fully developed use case description, the exception conditions represent what conditions prevent the system from successfully completing the use case. True False A state event occurs when something happens inside the system that triggers the need for processing True False Question 21 (3 points) An external agent or person that interacts with the system by supplying data is called an actor True False Question 22 (3 points) In a system sequence diagram, the order of the messages is determined by numbering the messages True False