- Recursive Functions. A regular binary tree is a binary tree whose internal nodes have exactly two subtrees. Write recursive functions to compute the following attributes of a regular binary tree; show the trace of execution of each function on the following tree. Assume that you have a Boolean function that tells you whether a node is a leaf. 1. The number of leaves in the tree. 2. The number of arcs in the tree. 3. The number of nodes in the tree. 4. The height of the tree (i.e. the longest distance from the root to any leaf). D B H E A 1 F C G
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