Write a function maxTree that finds the maximum values within a tree. For example, maxTree t returns 3. Note that this is NOT a search tree. This function assumes that the input tree is not a Leaf. IN SML SHOW OUTPUT WORKING

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Suppose we have a tree type and a variable t defined as follows:

datatype tree = Node of tree * int * tree
| Leaf
val t = Node(Node(Leaf, 1, Leaf), 2, Node(Leaf, 3, Leaf))
Note that t is a tree of the following form:
Node 2
/ \
Node 1 Node 3
/ \ / \
L L L L

Write a function maxTree that finds the maximum values within a tree.
For example, maxTree t returns 3. Note that this is NOT a search
tree. This function assumes that the input tree is not a Leaf.

IN SML SHOW OUTPUT WORKING 

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