Question

For both parts - what is the longest path (from any input to any output) that...

For both parts - what is the longest path (from
any input to any output) that a signal must traverse?  That is, how many gates
does it have to go through?
  a) a four bit OR'er (two 4-bit inputs and one 4-bit output)
  b) a four bit ripple carry adder (two 4-bit inputs and a five
     bit output)

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