Singly and Doubly Linked List have the following methods:

Insertion: insertAt, insertAtFront, and insertAtEnd

Deletion: removeAt, removeAtFront, and removeAtEnd

InsertAtFront and removeAtFront calls insertAt and removeAt by passing 0 as an index respectively. Moreover, insertAtEnd and removeAtEnd calls insertAt and removeAt by passing size (number of elements in Linked List) as an index respectively.

Write insertAt and removeAt JAVA methods (one for Singly and one for Doubly Linked List) that inserts and removes an elements from the List by index.