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Introduction. Addition is the most commonly performed arithmetic operation in digital systems. An adder combine two arithmetic operands using the addition rules described in class. The simplest adder, called a half adder, adds two 1-bit operands X and Y, producing a 2-bit sum. The sum can range from 0 to 2, which requires two bits to express. The low-order bit of the sum may be named HS(half sum), and the high- order bit may be named CO (Carry-out) CO HS In binary sums using modulo 2 arithmetic, it sums bit-to-bit without passing the CO to the following pair of bits. Example 10 1 1 0 1 1. Design a digital circuit that perform binary sums modulo 2 with 4-bit operands and draw its diagram. 2. Construct the circuit designed in (1) and complete the following tables Voltage lol A=0011 B=0101 A B A+B 0 0 1 1 0 1 1 Voltage A=1011 B=1101 A B A+B 1 1 0 1 1 0 1 1 Voltage A=0011 B-1111 A B A + B 0 1 0 1 1 1 1 1 Voltage A=0111 B=0100 A B A+B 0 0 1 1 1 0 1 0 Voltage A=1111 B=0101 B A+B 1 0 1 1 1 0 1 1 Voltage lololol A=0001 B=0111 A B A+B 0 1 1 1 1