Questionl: For the parallel adder in the following figure, determine the complete sum by analysis of the logical operation of the circuit. Verify your result by longhand addition of the two input numbers. (20 pts) A B C ABC A B C Cou M Cou M Con 3 Question2: For the parallel adder in the following figure, determine the complete sum by analysis of the logical operation of the circuit. Verify your result by longhand addition of the two input numbers. (20 pts) 0 0 . A B Cin ABC A B C Car Can (Con Can Cout . 2 2 24 Question3: Write the truth table of 4:2 encoder, 2:4 decoder, 4:1 multiplexer, 1:4 demultiplexer (60 pts)