Using a PLC, two NO push buttons (PB1 & PB2), a light, a power supply, and wires, please design and draw the circuit diagram & the ladder diagram of an automated system so that when the electric power is turned on - initially, the light is off. - when PB1 is pressed ONCE, the light will turn on and off REPEATEDLY at a frequency of 0.5Hz. - When PB2 is pressed, the light will be off. [NB: both the light and the valve need the full +24V to operate] [10%]