Identify the following nodes from the Events palette?
a) 1=Create User Event, 2=Generate User Event, 3=Unregister For Events, 4=Destroy User Event
b) 1=Open User Event, 2=Send User Event, 3=Wait For Events, 4=Close User Event
c) 1=Create User Event, 2=Send User Event, 3=Unregister For Events, 4=Destroy User Event
d) 1=Open User Event, 2=Generate User Event, 3=Wait For Events, 4=Close User Event