An online hotel booking software is used to book hotels online. Hotel owners register in the website, update room information and process orders. Customers can register in the system and place orders for booking different rooms such as standard room, superior room and business room on in the system directly. Different rooms have different numbers of beds, bed sizes, prices, allowed number of customers, etc. Users need to login into the system with appropriate username and password, select appropriate types and numbers of rooms, submit the order and pay for the order. Then hotel owners confirm the order and send notice to customers.

(1) Book room, Manage user account, Manage room information are three use cases for this system. Draw a use case diagram for this software. (5)

(2) Write a normal and an exception scenario for the Book room use case. (10)

(3) Draw a sequence diagram for the exception scenario in question (2).

3. An online hotel booking software is used to book hotels online. Hotel owners register in the website, update room information and process orders. Customers can register in the system and place orders for booking different rooms such as standard room, superior room and business room on in the system directly. Different rooms have different numbers of beds, bed sizes, prices, allowed number of customers, etc. Users need to login into the system with appropriate username and password, select appropriate types and numbers of rooms, submit the order and pay for the order. Then hotel owners confirm the order and send notice to customers. (1) Book room, Manage user account, Manage room information" are three use cases for this system. Draw a use case diagram for this software. (5') (2) Write a normal and an exception scenario for the Book room use case. (10) (3) Draw a sequence diagram for the exception scenario in question (2) (10')