1. Discover ambiguities or omissions in the following statement of requirements for part of a ticket-issuing system.

An automated ticket issuing system sells rail tickets. Users select their destination and input card details and a personal identification number. The rail ticket is issued and their card account is charged. When the user presses the start button, a menu display of potential destinations is activated, along with a message to the user to select the destination. Once a destination is selected, users are required to input the card details. Its' validity is checked and the user is then requested to input the personal identification. When the card transaction is validated, the ticket is issued.

2. For the same scenario, write the set of non-functional requirements.

3. Using your knowledge of an ATM, develop a set of Use Cases that could serve as a basis for understanding the requirements of an ATM.

4. Draw the sequence diagram for the same system (ATM) and explain why it might be necessary to have both Activity Diagram and Sequence Diagrams when modeling the behavior of a system.

All questions must be answered in essay format, with half a page of written work for each question, double-spaced, 12-font.