3. a. b. a. Apply the input waveforms (A,B,&C) of the following figure to a NOR gate, & draw the output waveform. Repeat with Cheld permanently LOW. Repeat with Cheld HIGH. - Write the expression for the output of the following figure and use it to determine the complete truth table. Then apply the waveforms of the figure in problem 3 to the circuit inputs, and draw the resulting output waveform E