Question: Assuming graph given below is a valid Binary Search Tree (BST) list the nodes containing the three smallest values in the tree (in ascending order
Assuming graph given below is a valid Binary Search Tree (BST) list the nodes containing the three smallest values in the tree (in ascending order of value).

Notes:
Your answer should be a valid python list of integers, eg, [7, 16, 9] is in the valid format and is shorthand for [X7, X16, X9]
The three nodes should be listed from smallest to biggest value, eg, [7, 16, 9] is saying that X7 is the smallest value in the tree, X16 is the second smallest and X9 is the third smallest.
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