1 pre-order traversal, with recursion: 2 35 28 20 25 23 26 30 60 70 65 64 68 3 4 pre-order traversal, without recursion: 5 35 60 70 6 7 in-order traversal, with recursion: 8 20 23 25 26 28 30 35 60 64 65 68 70 9 10 in-order traversal, without recursion: 11 20 23 25 26 28 30 35 60 64 65 68 70 12
