A security system is used to monitor doors and windows of a residence. This system uses several components, including photodiodes and contact switches to detect intruders. Circuits associated with contact switches provide OV if a door is close and 5Vif it is opened Draw a circuit for one contact switch Give the configuration of the interrupt associated registers if only one door is monitored using one contact switch Give the configuration of the interrupt associated registers if one door and one window are monitored (using two contact switches) Give the configuration of the interrupt associated registers if 10 windows and 4 doors are monitored