a a D a vb 5. Now we're going to learn how to add with logic. Instead of thinking of using logic with true and false (T or I), let's use 1 and 0. b a Vb) 1 1 1 so the truth table for V is : 1 b 0 1 With the logic gate 0 1 1 0 0 0 Now we're going to add 2 1-bit numbers, but there's a problem. Adding 2 1-bit numbers might give us a two bit answer. 1 + 1 = 10 So, we'll break the into two problems the bit on the right will be the sum bit s, and the bit on the left will be the carry bit c. bi + b2 (a) give the truth table for for the sum bit (b) give the truth table for for the carry bit (c) give logical formulas for the sum and carry bits. (d) give a circuit representing a + gate. This gate should have 2 b1,b2 inputs and 2 outputs s,c = CS