write the following 3 methods (i am learning the LinkedList in Java language, please help ):

1. append(LinkedList)

Append takes a LinkedList as a parameter and appends that LinkedList on the current LinkedList.

2. removeDuplicates()

removeDuplicates removes duplicate elements from the current Linkedlist.

3. moveNode(LinkedList)

moveNode(LinkedList) removes the first node from the parameter list and pushes it onto the front of the current LinkedList.