Take the procedural design approach and create first the context diagram, and then the highest - level data flow and control - flow diagrams for an electronic lock in the laboratory door having the following requirements specifications:

• The lock has an integrated RFID card reader, and every registered user has a unique identification code.

• An accepted card is acknowledged by a green LED and a rejected one by a red LED.

• The lock will open when an adequate current is flowing through its control solenoid; otherwise, it remains locked.

• Information about registered users and their permitted entrance times is stored on a database of a remote workstation that manages all locks within the whole college building.

• Every successful and unsuccessful opening attempt is recorded on the database with the corresponding identification code, date, and time.

• Embedded controllers of individual locks in the building communicate with the common workstation through a wireless communications network.

You may define additional requirements yourself, if needed.