From Airline reservation case study answer below questions.

1. Develop a use case diagram for the above case study?

2. Develop a class diagram for the above case study?

3. Develop a sequence diagram to buy a flight ticket?

4. Identify which architecture model can be applied to above case study and Justify your answer? [ No diagram required for this question]

PLEASE HELP ME

Case study A flight reservation system is a commonly used system. Typically a customer places an order for seats in a combination of connected flights from an origin to a destination airport. The customer and the system need to check the feasibility of flight connections and their schedule. The list of requirements for the reservation system is given below A flight is defined by a number and a date and defines a route from an origin airport to a destination airport. A plane is assigned to a flight and it contains a set of numbered seats Customers make/cancel/modify reservations for specific seats in specific flights. A route is the way followed by a flight from its origin airport to its destination airport. There may be several flights that share the same origin and destination airports. A route includes one or more spans A span is a part of a route to get from a start airport to a termination airport as part of a specific flight The start (or termination) airport is called origin (or destination) airport of this span For each flight there are several connecting flights (different flghtsthat leave from an intermediate stop closely after its arrival) A ticket includes a one-ticket route (one-way ticket) or a two-ticket route (round-trip ticket). Using a round-trip ticket, a passenger can go to an airport and come back using the same route. If the passenger returns using a different route, passenger needs a set of one-way tickets. Such a round-trip is a special case of one-way trip where its source and destination are the same. Stops are not indicated in the ticket unless the flight number changes, which indicates a plane change An airlink is any direct flight between two airports. All airlinks are spans of some flight. A basic airlink has no stops. A route is a set of connected basic airlinks connecting all the airports through which it passes For the convenience of customers we may keep information on relevant facilities; for origins we keep aspects such as parking, for destinations we list hotels near the airport, for intermediate stops we provide lists of hotels close to the airport, restaurants, etc. This information may also include details of the cities nearby