Question: The programming language is Emacs-Lisp. Implement a function in Lisp that takes in one parameter that is a list and returns the previous to last

The programming language is Emacs-Lisp.

Implement a function in Lisp that takes in one parameter that is a list and returns the previous to last element of the list.

If the list has less than two elements, it should return nil. Use the while loop for this function

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