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Consider the attributes of the previous question FlightN, FromCity, ToCity, FlightDate, DepartureTime, ArrivalTime, TicketN, TicketDate, PassengerName, Cost, Completed, PassengerAddress, Passenger Age. Based on the following

Consider the attributes of the previous question
FlightN, FromCity, ToCity, FlightDate, DepartureTime, ArrivalTime, TicketN, TicketDate, PassengerName, Cost, Completed, PassengerAddress,
Passenger Age.
Based on the following assumptions:
FlightN is the the key for the FromCity, ToCity, FlightDate, DepartureTime, and ArrivalTime;
Every ticket belongs to only one passenger;
Every passenger may purchase more than one ticket;
Every Ticket may include more than one flight;
Every flight of a ticket together determines the Cost and the attribute
Attribute 'Completed' indicates whether the flight has been completed ( i.e. the passenger has was on the flight).
Write all possible dependencies and find a key for all above attributes.
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