1Linked List Content: [Item1, Item5, Item3, Item6, Item2]
2LinkedList Content after addition: [First Item, Item1, Item5, Item3, Item6, Item2, Last Item]
3First element: First Item
4First element after update by set method: Changed first item
5LinkedList after deletion of first and last element: [Item1, Item5, Item3, Item6, Item2]
6Final Content: [Newly added item, Item1, Item3, Item6, Item2]