3. Construct the full adder circuit below in Multisim. Complete the truth table below to verify that the circuit implementation is operating correctly. (Save your design for step 5.) (15 points)
A B Ci Co A B Ci Co S
(On or Off) (On or Off) 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 0 1 1 1
4. Using AND, OR, and Exclusive-OR gates, draw a circuit diagram for a 2-bit adder. Use inputs A1, A2, B1, B2 and outputs S1, S2, and Co. Note that a carry-in is not needed, so a half-adder and a full-adder may be used. (20 points)