Book: Real-Time Systems: Scheduling, Analysis and Veirfication by Albert M K Cheng Chapter 4: Model checking of finite state systems URGENTLY REQUIRED!

5. Construct the state graph of the following mobile telephone/entertainment sys- tem: While the mobile telephone/entertainment system is turned on, if the tele- phone subsystem receives an incoming call while the radio, CD, or cassette player is on, then the telephone subsystem will ring after the radio/CD/cassette player is temporarily turned off. The radio/CD/cassette player resumes playing after either: the telephone rings 12 times without a user pressing the "send" but- ton, or the "send" button is pressed within the 12 rings and the conversation is ended by the user pressing the "end" button. The telephone subsystem does not ring on receiving an incoming call while the mobile telephone/entertainment system is turned off; in this case, the phone- mail subsystem is activated to record incoming messages 5. Construct the state graph of the following mobile telephone/entertainment sys- tem: While the mobile telephone/entertainment system is turned on, if the tele- phone subsystem receives an incoming call while the radio, CD, or cassette player is on, then the telephone subsystem will ring after the radio/CD/cassette player is temporarily turned off. The radio/CD/cassette player resumes playing after either: the telephone rings 12 times without a user pressing the "send" but- ton, or the "send" button is pressed within the 12 rings and the conversation is ended by the user pressing the "end" button. The telephone subsystem does not ring on receiving an incoming call while the mobile telephone/entertainment system is turned off; in this case, the phone- mail subsystem is activated to record incoming messages