Question: 5. The ripple carry adder below adds two 4-bit 2s complement numbers X and Y (i.e. S=X+Y), where X=X3X2X]Xo and Y=Y3Y2Y1Y0 a) (10 pts) Modify

5. The ripple carry adder below adds two 4-bit 2s complement

5. The ripple carry adder below adds two 4-bit 2s complement numbers X and Y (i.e. S=X+Y), where X=X3X2X]Xo and Y=Y3Y2Y1Y0 a) (10 pts) Modify this circuit in a way that it can perform subtraction. y3 13 C C C C Con Col Full Adder Full Adder Full Adder Full Adder b) (10 pts) Demonstrate the subtraction by showing the trace of the circuit for performing: 0011-0111. If you fail part a, show the trace of 0011+0111 on the originally given circuit

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