Question: 1) Prove that ((P -> Q) / ~P) / P is a tautology by proving T => ((P -> Q) / ~P) / P. Use

1) Prove that ((P -> Q) /\ ~P) \/ P is a tautology by proving T => ((P -> Q) /\ ~P) \/ P. Use the laws and specify which law is used in each step. Don't use truth tables

2) Prove the following implications P -> (Q -> R) => (P /\ Q) -> R . Use the laws and specify which law is used in each step. Don't use truth tables

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