I JUST NEED THE SCREENSHOT OF THE FINAL RESULT. THANK YOU! Design a 4-bit adder/subtractor circuit. A control input will determine whether the circuit adds or subtracts two four-bit numbers using two’s complement binary arithmetic. Use hierarchical design using full adders.  Hint: A PLD design that is in layers or levels is called a hierarchical design. The highest level of design contains components that are themselves complete designs. These components have lower level designs embedded within them. Let’s assume that you want to add two two-bit numbers. Then you can create a default symbol for a fulladder circuit. A default symbol is a graphical symbol that represents a PLD design as a block, showing only the design’s inputs and outputs. Then you can use this symbol twice to design an adder that adds two-bit numbers.

I JUST NEED THE SCREENSHOT OF THE FINAL RESULT. THANK YOU!

Design a 4-bit adder/subtractor circuit. A control input will determine whether the circuit adds or subtracts two four-bit numbers using two’s complement binary arithmetic. Use hierarchical design using full adders. 

Hint: A PLD design that is in layers or levels is called a hierarchical design. The highest level of design contains components that are themselves complete designs. These components have lower level designs embedded within them. Let’s assume that you want to add two two-bit numbers. Then you can create a default symbol for a fulladder circuit. A default symbol is a graphical symbol that represents a PLD design as a block, showing only the design’s inputs and outputs. Then you can use this symbol twice to design an adder that adds two-bit numbers.