The petition for review is granted. The decision of the Court of Appeals in Greenfield v. Cheek, 122 Ariz.App. 70, 593 P.2d 293 (1978) is approved and adopted as the opinion of this court. Anything to the contrary in Washington National Corp. v. Thomas, 117 Ariz. 95, 570 P.2d 1268 (App. 1977) and Baker v. Walston & Co., Inc., 7 Ariz.App. 590, 442 P.2d 148 (1968) is hereby disapproved.