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Show that whether each of the following propositions is a tautology, satisfiable but not a tautology, or a contradiction. If it is a tautology or

Show that whether each of the following propositions is a tautology, satisfiable but not a tautology, or a contradiction. If it is a tautology or a contradiction, please give the proof. If it is satisfiable, please give a truth assignment and a false assignment.

a. B (BA)

b. (AB) B

c. (CB) (((BA) B) C)

d. (ABD) (ABD) (ABD) (ACD) (ABC)

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