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EEE 120Week 3’s Extra Credit Problem’s Answer SheetA 4-Option 4-Bit Add/Sub CircuitNameDate: 6/29/2018SolutionCopy and paste your Logisim circuit here. Or copy and paste your handwritten circuit here if you were not able to build a working design on Logisim.Note: the Add/Sub circuit has data inputs A0, A1, A2, A3 and B0, B1, B2, B3, and control inputs SA,SB. The outputs are S0, S1, S2, S3 and Cout.