Exercise
FIGURE 11-34 Binary tree for Exercises 3 through 8
1. Find $L_A$, the node in the left subtree of A.
2. Find $R_A$, the node in the right subtree of A.
3. Find $R_B$, the node in the right subtree of B.
4. List the nodes of this binary tree in an inorder sequence.
5. List the nodes of this binary tree in a preorder sequence.
6. List the nodes of this binary tree in a postorder sequence.