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If the statement p and q are true and th...

If the statement p and q are true and the statements r and s are false, fing the truth values of :
(1) `(~pvvq)to(s^^~r)`
(2) `[p^^(q^^r)]vv[(pvvq)^^(~rvvs)]`
(3) `~[(~p^^r)vv(sto~q)]iff(p^^r)`.

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