How to find nth element from the end of a singly linked list?

Question

The following function is trying to find the nth to last element of a singly linked list.

For example:

If the elements are

Answer 1

What do you think regarding this approach.

1. Count length of the linkedlist.
2. Actual Node index from head = linkedlist length - given index;
3. Write a function to travesre from head and get the node at the above index.