If \(P\) \(=\) \(\{x: x\) is a multiple of \(2\), \(n \in \mathbb{N}\) and \(n \le 18\}\), \(Q\) \(=\) \(\{x: x\) is a multiple of \(3\), \(n \in \mathbb{N}\) and \(n \le 18\}\) and \(R\) \(=\) \(\{x: x\) is a multiple of \(6\), \(n \in \mathbb{N}\) and \(n \le 18\}\), then find \( P\cap (Q \cup R)\).
\(P \cap (Q \cup R)\) \(=\) .
[Note: Insert the numbers in ascending order, also insert comma to separate the numbers]