In: Computer Science
            Draw and submit one or
more UML sequence diagrams for the following elevator user
story:
As...
                
            Draw and submit one or
more UML sequence diagrams for the following elevator user
story:
As a user of an
elevator building, I need to be able
- to call an elevator to my floor and ride the elevator to
another floor.
 
- know that my elevator request is being serviced (and that the
elevator is not out-of-order).
 
- stop the elevator doors from closing on me as I enter or exit
the car.
 
- know that I have arrived at the correct destination floor.
 
- signal for help in an emergency within the car