Part 2 - Class diagram Read the scenario below carefully. Scenario FlyHigh is a company that allows its customers to purchase flights either by making a telephone call to its call centre or by using its web site directly. The online customers need to log on and follow the online booking procedure. The website will manage all aspects of the booking. telephone customers must make a phone call and speak to a member of the FlyHigh staff. All customers must provide a name, address & passport number, as well as their flight requirements. There are two kinds of FlyHigh staff. Sales Clerks and Supervisors. Sales Clerks deal with telephone customers and will lead them through the booking process. They also cancel and change existing bookings. Supervisors do not deal with customers but perform several duties including running daily management reports & calculating daily sales figures. All members of FlyHigh staff have a name, employee number, a job title and a pay grade. Once the customer has completed their dealings with the FlyHigh staff, they will be assigned to a suitable flight. Customers can book flights up to 6 months in advance. When the customer arrives at the airport, they will use a member of the airport staff. There are two types: check-in staff and gate staff. Both of these types of staff deal With customers. The check-in staff will verify the customer's identity, check-in the customers to their flight and will advise of the departure gate as well as any delays. The check-in staff member will also issue a boarding card and update the flight records. The gate staff will also verify the customer's identity. They also check the passenger is at the correct boarding gate and they too update the flight records. All airport staff have staff numbers, names, job titles and a security clearance level. Flights have unique flight numbers, destination airports, plus arrival and departure times. Task 2 (a) Create a class diagram based around the following four classes: customer FlyHigh staff airport staff flight Make sure your diagram clearly shows any generalisation relationships as well as any other relationships which exist between the classes. You do not need to worry about properties and methods for this diagram. Task 2 (b) Take any one of the superclasses as well as its subclasses and redraw this part of the diagram to include their properties and methods