Design an 8-bit ripple-carry adder and draw its schematic. Useblock symbols for two circuits, a half adder and a full adder.Label all inputs, outputs, and connections. Use a half adder forthe LSB, and full adders for the remaining 7 bits. Add an activehigh overflow indicator and the required detection circuitry. Thecircuit should have inputs a7 through a0, inputs b7 through b0, sumoutputs s7 through s0, and output overflow. For all inputs/outputsuse index 7 as the MSB and index 0 as the LSB.