Again we are dealing with the poor engineers in the land of Logicia. For some sort of fancy circuitry, a 7-bit binary input is received. As a result it should give the amount of “1″s present in this vector. For example, for the inputs 1100110 and 1001110 the result should be the same and equal to 100 (4 in binary). This time however, the only components they have on their hands are Full Adders. Describe the circuit with minimum amount of parts.

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