Java linked list.

For this exercise, you will write two methods for LinkedList class. You need to download Node. java, LinkedList. java. These were discussed in the lectures. You will add these two methods to the Linkedlist class and then create a demo program and to test these two methods. a) Write a method called countWord. It takes in a String returns the number of times the String is contained in the Linkedlist. public int countword (String word) b) Write a method called lastIndexOf. It takes in a String and returns the index of the last occurrence in the list (assume the first element (front) is at index 0). It returns -1 if the item is not in the list. public int lastIndexOf (String word) c) Write a method called remove which takes in a String as a parameter that removes every occurrence in the Linkedlist (note, this is a void method). public void remove (String word)