Write a ladder-logic program for the cooling-system control shown in fig the temperature must be maintained below 0C. Temperature fluctuations are monitored by means of a sensor. If the temperature rises above 0C, the cooling system switches on for a predetermined time. The cooling- system-on lamp is lit during this time. The cooling system and lamp are turned OFF if one of the following conditions is fulfilled: The sensor reports a temperature fall below 0C. The preset cooling time has elapsed. The push-button switch STOP has been pressed. If the preset cooling time has expired and the temperature in the cold room is still too high, the cooling system can be restarted by means of the push-button switch RESET. Stop Temperature sensor Page Reset Cooling system Lamp 18-