G 6. Code the function, palindrome, which is passed a list and returns T if the list is a palindrome; otherwise, it returns NIL. It only needs to be a palindrome at the top-level. Examples: > (palindrome '(R A C E C A R)) T > (palindrome '(W A S I T A C A R O R A C A T I S A W)) T > (palindrome '(N I X O N)) NIL