English: 3) Design an arithmetic circuit with one selection variable S, two n-bit data inputs A and B and n-bit output D. The circuit generates four arithmetic operations together with the input Cin. These operations are when S-0; D-AIB for Cin-0 and D-A1 for Cin-1. When S-1; D-A-1 for Cin-0 and D-A-B for Cin- 1. Draw the logic diagram of the arithmetic circuit for the first four stages. Explain the diagram in detail.