Question: Parallel adder: Parallel Subtractor: Please show your work. Thank you! 3. Design a calculator circuit which can perform either addition or output. Your circuit should

Parallel adder:

Parallel Subtractor:

Please show your work. Thank you!
3. Design a calculator circuit which can perform either addition or output. Your circuit should let the user decide if the operation should be addition or subtraction. Note: you can re-use your parallel adder and parallel subtractor circuits generated for previous questions. (20 points)
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