II. Given a video cassette recorder (VCR). The VCR has several buttons, including select, on/off, and set for setting the clock and automatic start-stop timers, auto for enabling automatic recording, vcr for bypassing the VCR, and timed for recording for 15-minute increments. Many of the events correspond to pressing the button with same name. Several buttons have a toggling behavior. For example, pressing vcr toggles between VCR and TV mode. Several buttons used for manual control of the VCR are not accounted for, such as play, record, fast forward, rewind, pause, and eject. These buttons are enabled only in the Manual state. Do the following: a. Prepare a use case diagram with the description chart to list all of events and activities along with a brief definition. b. Prepare a state diagram to represent the event trigger system transition based on the above description.