Draw an activity diagram using signals to capture the following series of events:
- Three days before the flight, my travel agent emails me with a list of required travel documents.
- If the list is not received by the three day deadline I cancel the flight.
- Otherwise: Three hours before the flight, I order a taxi. When the taxi arrives, I depart for the airport
Hi I'm wondering can any one help me with this I have an exam coming up and am having trouble, especially with timed events. Thank you.