Problem
1. We can define the inorder traversal of an orchard as follows: If the orchard is empty, do nothing. Otherwise, first traverse the orchard of subtrees of the first tree's root in inorder, then visit the root of the first tree, and then traverse the orchard of remaining subtrees in inorder. Prove that inorder traversal of an orchard and inorder traversal of the corresponding binary tree will visit the vertices in the same order.
2. Describe a way of traversing an orchard that will visit the vertices in the same order as postorder traversal of the corresponding binary tree. Prove that your traversal method visits the vertices in the correct order.