Question: The linked list class in the Java library supports bidirectional iterators. To go backward efficiently, each Node has an added reference, previous, to the predecessor

The linked list class in the Java library supports bidirectional iterators. To go backward efficiently, each Node has an added reference, previous, to the predecessor node in the linked list. Draw a “before/after” diagram of the changes to the links in a linked list when the addFirst and removeFirst methods execute. The diagram should show how the previous references need to be updated.

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