Have to implement this function by its docstring. We can use all prive and public attributes of LinkedList and_Node(which are only _first for LinkedList and item, next for _Node)

this is python

def swap(1st: LinkedList, i: int, j: int) -> None: Swap the values stored at indexes and in the given linked list. Precondition: i and j are >= 0. Raise an IndexError if i orj (or both) are too large (out of bounds for this list). NOTE: You don't need to create new nodes or change any "next" attributes. You can implement this method simply by assigning to the "item" attribute of existing nodes. >>> linky - LinkedList([10, 20, 30, 40, 50]) >>> swap (linky, 0, 3) >>> str(linky) [40 -> 20 - 30 -> 10 -> 50]