(a) Consider that you were asked to design a simple restaurant booking system. Given the following use case diagram and narratives, develop an initial domain model (class diagram) that you think captures the requirements. OK Receptionist OK Head Walter Record Booking 1. receptionist enters reservation date 2. system displays bookings 3. receptionist enters customer details and table number system records and displays new booking 4. Record booking) Cancel booking Record arrival Table transfer Record Arrival 1. head waiter enters date 2. system displays bookings 3. head waiter confirms arrival for booking 4. system records this and updates display (b) For the Record Booking use case narrative above, develop a sequence diagram that you think could show how a set of objects could collaborate to realise it. In your sequence diagram, add any additional instances of classes (such as boundary or controller classes) that you need to complete the use case realisation.