Possible non-functional response time and reliability requirements may include: 1. After the customer presses a button on the machine, the display should be updated within 0.5 seconds. 2. The ticket issuing time after credit card validation has been received should not exceed 10 seconds. 3. When validating credit cards. the display should provide a status message for customers indicating that activity is taking place. This tells the customer that the potentially time consuming activity of validation is still in progress and that the system has not simply failed. 4. The maximum acceptable failure rate for ticket issue requests is 1: 10000. Below is the list of correct/incorrect answers. Please circle the correct answer.