5 Given that \(n\) is a positive integer, write down whether the following statements are always true (T), always false (F) or could be either true or false (E).
- \(2 n + 1\) is an odd integer
- \(3 n + 1\) is an even integer
- \(n\) is odd \(\Rightarrow n ^ { 2 }\) is odd
- \(n ^ { 2 }\) is odd \(\Rightarrow n ^ { 3 }\) is even