Question: Show that the following arguments are valid using inference rules: ( a ) p q , p - > ( r s t ) ,

Show that the following arguments are valid using inference rules:
(a) p q, p ->(r s t), s, t q
(b)(p q)-> r,(q t)-> s,(s u), p (u t) r
(c) q -> p, q ->(s t), u -> s, u, t p
(d)(p q)->(r s), r -> w, w p

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