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174. Using 4-bit adders to create a 1See Section 6-bit adder:
(a) requires 16 adders.
(b) requires 4 adders.
(c) requires the carry-out of the less significant adder to be connected to the carry-in of the next significant adder.
(d) requires 4 adders and the connection of the carry out of the less significant adder to the carry-in of the next significant adder.
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