How many of the five rules of validity require us to examine both the premises and the conclusion?

Question

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Rules 1 (the rule of identity), 4 (the rule of contrapositive), and 5 (the rule of replacement) require us to examine both the premises and the conclusion to determine validity. Rules 2 (the rule of negation) and 3 (the rule of transitivity) only require us to examine the relationship between the premises.

How Many of the Five Rules of Validity Require Us