If \(P\) \(=\) \(\{\)\(z\) : \(z\) \(=\) , \(n \in \mathbb{N}\) and \(n \le 3\}\), \(Q\) \(=\) \(\{\)\(z\) : \(z\) \(=\) , \(n \in \mathbb{N}\) and \(n \le 3\}\), then find the following.
(i) Commutative property of intersection of sets:
(ii) \(Q\) \(\cap\) \(P\) \(=\)