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Decide whether each of the following arguments are valid by first converting to a question of...

Decide whether each of the following arguments are valid by first converting
to a question of satisfiability of clauses (see the Proposition), and then using the DPP
(¬Qv S),¬(S ∧P),((P→Q)∧R),((¬P→R)→¬P),therefore¬(S→P)

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