Suppose we would like to create a data structure for holding numbers that canbe accessed either in the order that they were added or in sorted order. Weneed nodes having two references. If you follow one trail of references, you getthe items in the order they were added. If you follow the other trail of references, you get the items in numeric order. Create a class DualNode that wouldsupport such a data structure. Do not write the data structure itself.

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Stack operations

A stack is a linear data structure that follows certain order to perform the operation; the order will be LIFO (Last In First Out) data structure. In the stack data structure elements/items are removed and added only from the top. The topmost stack item/element is pointed by the top pointer and the element which is added to the stack first will get deleted at the last.