he elements of a negligence claim are: (1) the existence of a duty, (2) breach of that duty, (3) resulting injury, and (4) proximate cause. Degel v. Majestic Mobile Manor, Inc., 129 Wn.2d 43, 914 P.2d 728, 731 (Wash. 1996). Whether the independent duty doctrine applies to negligence claims depends on whether the plai