16 flights must land at, be serviced by, and take off from, anairport. All flights that approach the airport go to a 20,000holding pattern, which can accomodate all of the flightssimultaneously. However, as they approach to land, they go thru 4different flight areas. Each flight area can hold its own maximumnumber of flights, and must be visited in the given order:
Flight Area:Number of
simultaneous flights:10000 ft holding pattern3Landing Runway1Terminal4Take off Runway1
Note: some flight areas can hold multipleflights. Therefore, we do not want to lockthe flight area. Rather, we want to lock the enter()-ingand leave()-ing of the flight area.
You must:
Make main() create
OR
PayPal Gateway not configured
OR
PayPal Gateway not configured