4-bit full-adder circuitBelow is the schematic of the 4-bit full-adder/subtractor you will implement in Lab 6. It has two inputs, A and B,which are both 4-bit numbers. The sum of these two numbers will also be 4-bit, plus a carry-out bit if overflowoccurs.Selector Sa3 b3 a2 b2 a1 b1 a0 b0SUnsignedOverflowy3 y2 y1 y0CoutC3 C2 C1 C0FA FA FA FASignedOverflowf3 f2 f1 f0

4-Bit Parallel Adder using Full Adders Video Lecture | Analog and Digital Electronics - Electrical Engineering (EE)