please also include explanations

3. [1 Point] Theorem: Let n be an integer. If n2 is even, then n is even. The following proof is flawed. Proof (by contrapositive) 1. Instead of the original statement, we prove its contrapositive: 2. If n2 is odd, then n is odd. 3. Assume that n2 is odd. 4. Claim n is odd. 5. By assumption, n2 = n . n is odd. 6. In class we learned that if a product is odd, then each factor is odd. (Lesson 3b slide 8) 7. Therefore n is odd. 0 Identify the line containing the error and explain what that error is