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What is the output for the following circuit?

  1. $w=\overline{b} c$
  2. $w=b \oplus c$
  3. $w=\overline{b \oplus c}$
  4. $w=\overline{b}+\overline{c}$
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$f_1=\bar b \bar c, f_2=bc$

$w=\bar b\bar c +bc= \overline{(b\oplus c)}$
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