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( a ) Is A - > B satisfiable? ( b ) Is ( A A ) ( B B ) satisfiable? ( c )

(a) Is A -> B satisfiable?
(b) Is (A A)(B B) satisfiable?
(c) Is X -> X a contradiction?
(d) Is A ->(A B) a tautology?
(e) Is A ->(A B) a contingency?
(f) Is (A -> B)(C B)-> A -> C a tautology?
(g) Is (A -> B)(C B)-> A -> C satisfiable?
(h) Is (A -> B)(C B)-> A -> C a contingency?
(i) Is (A -> B)->( A -> B) a contradiction?
(j) Is (A -> B)->( A -> B) a tautology?
(k) Is A
(D D)->(B B)(C -> C)
satisfiable? Give me truth tables with them

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