3. Explain how to measure 1 litre of milk for filling into a bottle using timer. 4. Design a LAD program to control a Motor, Cooling Fan, and Load Valve. When the Start Push Button is pressed momentarily: Motor will run immediately for 1min. Cooling fan will run immediately and stop 30sec after the motor stops. Load Valve will only open 10 secs after motor startup and close when motor stops. When the Stop Push Button is pressed momentarily: Motor will stop immediately. Cooling Fan will stop 30sec after Stop Push Put n is pressed. 5. Load Valve will close immediately