How many of the three arrows outgoing from the diamond shape (as depicted in the exhibit) will be given values at one time in a well-defined activity diagram?
What notation may be added to the line connecting a use case with an actor to indicate that the actor can participate in several instances of the use case at the same time?
How many of the three arrows outgoing from the solid circle (as depicted in the exhibit) will be given values during the execution of a well-defined activity diagram?