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Please do Part C Decide whether each of the following wffs is valid or invalid. Justify your answer. a. (Vx)A(x) (3x)[A(x)]')' b. (Vx)[P(x) Q(x)] ^

Please do Part C

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Decide whether each of the following wffs is valid or invalid. Justify your answer. a. (Vx)A(x) (3x)[A(x)]')' b. (Vx)[P(x) Q(x)] ^ (5x)[P(x) V Q(x)] (Ex)[P(x) ^ Q(x)] c. (Vx)[P(x) V Q(x)] (Vx)P(x) V (Sy)2(y)

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