Data structure Quiz// for (int i = 0; i < n; i++) { 

 System.out.println("hello");

} 

for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) {

 System.out.println("hello"); } } 

1-		O(n + n2)
2-		O(n2)
3-		O(2n2)
	4-	O(n)