1. Insert integers 11, 22, 15, 44, 6, 9, 3, 33, 17, 5 into a BST in that order. Draw the final tree.

2. What is the height of node 3, and node 9, respectively? What is the depth of node 3, and node 9, respectively?

3. What is the level of node 17, and node 11, respectively?

4. From the BST in question (3), delete node with 3, and then delete the node with 22, respectively; Then insert a node with 18 into the BST. Draw the final tree after above operations are finished.