Pre-lab: A) Using a 4-Bit Binary Full Adder chip (74LS83) and any other necessary support logic, design an Adder / Subtractor for two 4-bit numbers as discussed in class. The subtractor circuitry will create a 2's complement representation of the subtrahend as demonstrated during class lecture. Identify "bit weights" in your design B) Use CAD software to create a wiring diagram for this lab. C) Print the schematics for use when building your circuits. must also be attached to this document for final grading. The printed schematics Pre-lab: A) Using a 4-Bit Binary Full Adder chip (74LS83) and any other necessary support logic, design an Adder / Subtractor for two 4-bit numbers as discussed in class. The subtractor circuitry will create a 2's complement representation of the subtrahend as demonstrated during class lecture. Identify "bit weights" in your design B) Use CAD software to create a wiring diagram for this lab. C) Print the schematics for use when building your circuits. must also be attached to this document for final grading. The printed schematics