Implementing the Main Method: Use a do$-$while loop to present a menu to the user until they choose to exit. Implement switch$-$case statements to handle user choices and call relevant methods. Complete the method stubs: Implement logic for selecting flights, choosing classes, specifying baggage weight, calculating prices, and confirming bookings. a$.$ Selecting Flight and Class: Create a method that displays available flights and allows the user to choose one. These methods display available options to the user, take their input, and return the user's choice. This could be an integer representing the flight. b$.$ Select Trip Type: Design a method that offers options for one$-$way or round$-$trip flights and captures the user's selection. c$.$ Specifying Baggage Weight: T