The TOPFlight airline company is developing a new computer system to be used to support the sales of budget air tickets online to clients. A client can book an air ticket online via TOPFlights website by giving the following details: origin, destination, departure and return dates, number of adults and children travelling, ticket types etc. Availability of the requested air ticket(s) is checked against the TOPFlights fight booking file. If more than one flight is available on requested dates, a table of available flights is displayed (together with its corresponding ticket price and type) for client to choose. Next, client must give his/her personal details such as date of birth, gender, address of origin and destination, passport name and number, and contact details including email address and phone number etc. Payment details from client such as credit card number, bank issuing the credit card, expiry date and name of credit card holder etc. must then be entered by the client. TOPFlight will then contact the bank of clients credit card for credit approval. If the bank of the clients credit card gives the credit card authorization, a confirmation email together with the e-ticket will be emailed to the client.

From the above description, draw a diagram showing the flow of input information (and/or data) and output information (and/or data) to and from processes within this order processing system and any external environmental elements that interact with this order processing system. In your diagram, you must identify the following:

a. processes inside this order processing system,