Q2 An automated ticket-issuing system sells rail tickets. When the user presses the start button, a menu display of potential destinations is activated, along with a message to the user to select a destination. Once a destination has been selected, users are requested to input their credit card. Its validity is checked and the user is then requested to input a personal identifier. When the credit transaction has been validated, the ticket is issued. Determine any five ambiguities or omissions in the above stated statement of requirements for part of a ticket-issuing system.