What are the elements of the tort of intentional interference with prospective economic advantage?

The elements of the tort of intentional interference with prospective economic advantage are: (1) an economic relationship between the plaintiff and some third person containing the probability of future economic benefit to the plaintiff; (2) knowledge by the defendant of the existence of the relationship; (3) intentional acts on the part of the defendant designed to disrupt the relationship; (4) actual disruption of the relationship; and (5) damages to the plaintiff proximately caused by the acts of the defendant. (Buckaloo v. Johnson (1975) 14 Cal.3d 815, 827, 122 Cal.Rptr. 745, 537 P.2d 865.)