Let P be the statement: "For all a, b, c € Z, if ged(a, b) = 1 and c divides a + b, then ged(a, c) = 1 and gcd(b, c) = 1." (a) Is P true? Prove your answer. (b) Write out the converse of P. Is the converse of P true? Prove your answer. (c) Write out the contrapositive of P. Is the contrapositive of P true? Explain. (d) Write out the negation of P. Is the negation of P true? Explain.

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