Q. A CMOS pair is used, as shown in the circuit above, to switch an LED on and off using an input voltage that is either 5V or 0V, at different times A, B, C, etc. Summarize the switching action by filling in the table below. Explain your reasoning briefly. Assuming 2 V across the LED when it is on, determine the value of the output resistor if the device current in the on state is 1 mA.