3. In the figure on the right, if the colored FAs require 1 gate delay to produce both its carry-out and sum, while all other FAs require 2 gate delays to produce their results, what is the number of gate delays for the FA marked with a question mark to produce its correct output? PP3 PP2 Partial product (PPO) PPI 0 0000 + P7 P6 Ps P4 P3 m₂ 0 Multiplicand m, 0 PI m₁ 0 1 Po Multiplier mo 90 0 PP4=P7 P6 Po= Product

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