Ex1. Classify the following statements as business (B), functional (F), non- functional (N), or data (D) requirements; for the latter three, also classify them as user-level (U), operational-level (O), or physical-level (P) requirements:(a) The program must process at least 3,000 calls per hour.(b) The default credit card choice on the payment form must be "Visa."(c) The program must notify the operator when the order quantity is greater than the quantity on hand.(d) The product must be rated as most reliable in published product reviews within a year after release.(e) In the daily report, the title must be in the form "Daily Report for dd/mm/yy," where dd is the current day of the month as a two digit number, mm is the current month as a two-digit number, and yy is the last two digits of the current year.(f) The product must strap to patients’ wrists and measure several bodily functions to monitor and record stress levels.(g) The daily report of expiring drug batches must list, for each expiring drug, the drug name, manufacturer, batch number, and pharmacy bin number.(h) The pillbox must record the medication stored in each of its hoppers in a string of 0 to 24 alphanumeric characters.(i) The product must reduce support costs by 15% in three months. Chapter 3 Exercises 95(j) Each elevator’s default floor parking location must be an integer in the range lowest-floor to highest-floor.(k) An elevator in an idle state must transition to an active state if one or more floors different from the current floor are selected on its control panel, or if a call message is received from the dispatcher. a product.