Question 10Which of the following sequences cannot occur from a postorder traversal of a binary search tree with the keys 1, 2, 3, 4, 5?

The question is asking for a sequence that cannot be the result of a postorder traversal of a binary search tree with the keys 1, 2, 3, 4, 5. However, you have not provided any sequences to choose from.

In a postorder traversal, the process is: left child, right child, root.

For a binary search tree with the keys 1, 2, 3, 4, 5, one possible postorder traversal could be: 1, 3, 2, 5, 4.

However, a sequence like 5, 4, 3, 2, 1 could not be the result of a postorder traversal of this tree, because in a binary search tree, the left child must be less than the root and the right child must be greater. In the sequence 5, 4, 3, 2, 1, this rule is violated.

Please provide the sequences you want to check, and I can help you determine which cannot be the result of a postorder traversal of this binary search tree.