Assignment:
(a) Assume that n is a positive integer. Use the proof by contradiction method to prove and explain:
If 3n + 2 is an even integer then n is an even integer.
(b) Assume that n is a positive integer. Prove the following:
n is an even integer iff 3n + 2 is an even integer.
(Note this is an if and only if (iff) statement.)
Provide complete and step by step solution for the question and show calculations and use formulas.