3. Consider an eight-bit 2's complement number, X. Let Ax = [X] (absolute value of x). Using an adder, and a multiplexer, and whatever else you need, design a circuit that computes Ax. HINTS: Consider the process to move from negative to positive 2's C numbers. You do not need to show a truth table for this circuit. You do not need to show the gates inside the adder or multiplexer. We are designing at the block level here, where you use the adder and multiplexer as a component in the circuit You may use additional gates if needed