
a.
Explanation of Solution
The algorithm of inorder traversal is similar to the algorithm of preorder traversal except printing the node. In inorder traversal, the node is printed after visiting its sub tree and the algorithm for inorder traversal is as follows
TreeNode: node
Boolean: done
Stack: stack
Node root
...
b.
Explanation of Solution
Algorithm for postorder traversal:
The algorithm of postorder traversal is different from the algorithms of preorder and inorder traversals. In postorder traversal, the parent node is visited twice whereas in preorder and inorder traversals, it is visited only once and the algorithm for postorder traversal is as follows
TreeNode: node
Boolean: done
Stack: stack
Node root
Done FALSE
While NOT ...

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