design the logic to control the temperature in a green house. the temperature between 72 degrees and 80 degrees if the tem is below 72 degrees, a heater must be activated if the tem is above 80 degrees a cooler must be started. there are 2 sensors one output a high if tem is below 72 degrees and one outputs a high if the tem is above 80 degrees. these sensors are prone to failure so the design must be able to detect if both sensors are on at the same time. if that happens, the circuit must turn off the heater, turn off the cooler and set an alarm for maintenance represent the heater and alarm as a rectangle design the logic for security system. the system contains a door sensor a window sensor and a key activation switch. if the switch is on opening the window will set off alarm immediately. opening the door will start a 30 second timers. if the the key switch is not turned off within 30 sec thte alarm is set off. the door sensor and window sensor output a low when they are opend. the 30 sec timer requires a high to activate and output a high when the timer expire. the key switch output a high when it is activated and low when it is deactivated in ur circuit schematic represent the timer as a box labeled 30 s timer