Some implementations of a binary tree do not use null to indicate the absence of a child. Instead, they use references to a single dummy node. A reference to an empty tree is to this same dummy node. Modify the implementation of BinaryTree in this way.   Java program

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A: Answer: We have done through recursive calling the function preorder, Inorder and Postorder

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A:

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A: The solution for the above given question is given below:

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A: ANSWER:-

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A: The Python code along with the snapshot of code and output is given below.

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