12. In the ArrayListProbs class complete the method public Book highestPricedBook (ArrayList list) that returns a reference to the Book object with the highest price, given a list of Books.

In System Design, you should be familiar with a total of four different design models.

For this system: Airline Reservation System For Customers Book Flights Buy Tickets Make Payment Print Boarding card Cancel booking For management staff Create new Flights Modify Flights Details Flights cancel .... Write one scenario and design the corresponding Sequence Diagram that describe one of the main use cases.

In System Design, you should be familiar with a total of four different design models.