3. Find the result of set operations

If \(L\) \(=\) \(\{x: x\) is a multiple of \(2\), \(n \in \mathbb{N}\) and \(n \le 19\}\), \(M\) \(=\) \(\{x: x\) is a multiple of \(3\), \(n \in \mathbb{N}\) and \(n \le 19\}\) and \(N\) \(=\) \(\{x: x\) is a multiple of \(6\), \(n \in \mathbb{N}\) and \(n \le 19\}\), then find \( L\cap (M \cup N)\).

 

\(L \cap (M \cup N)\) \(=\) $\left\{i,i,i\right\}$.