Question: 3. Prove, by indirect proof, that if n is an integer and 3n+ 3 is odd, then n is even. Show all your work. (4

3. Prove, by indirect proof, that if n is an integer and 3n+ 3 is odd, then n is even. Show all your work. (4 marks) 4. Prove, using a proof by contradiction, that if n is an integer and n? - 3 is an odd number for n > 2, then n is an even number. Show all your work. (4 marks)

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