Write a Prolog predicate has_triplicate (x) that is true if list x contains triplicated elements (that is at least 3 copies of an element). For instance (user input is in red): Hints: ?- has_triplicates ([a, e,e,d, s,e]). Yes ?- has_triplicates ([a, a, b, e,b,s,s,e). No ?- has_triplicates ( []). No You will probably need a helper predicate to implement has_duplicates ().