Question: Show that a binary tree with n elements has 2n + 1 subtrees (including the entire tree). How many of these subtrees are empty? The

Show that a binary tree with n elements has 2n + 1 subtrees (including the entire tree). How many of these subtrees are empty?

The Binary Tree Theorem is stated for non-empty binary trees. Show that parts 1, 2, and 4 hold even for an empty binary tree.

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