https://teaching.csse.uwa.edu.au/units/CITS4401/exams/sampleExamPaper-2017-ANSWERS%20-%20flattened.pdf

A security light system has a switch and a motion sensor attached. It can be either armed or unarmed. If the switch is in the off position the light is off and the system is unarmed. When the switch is turned on, the light stays off but the system is armed. If the system is armed and the motion sensor detects movement, the light comes on. If no movement is detected for 5 seconds, the light goes off. Draw a UML state-chart diagram to describe the states of the security light system