In order to determine whether special relationships gives rise to a legal duty to act does exist in a particular case it is necessary to balance the societal interest involved, the severity of the risk , the burden upon the defendant, the likelihood of occurrence, in the relationship between parties. Other factors which may give rise to a duty include the foreseeability of the harm, the defendant's ability to comply with the proposed duty , the victim's inability to protect himself from the harm, the costs of providing protection, and whether the plate if had bestowed some economic benefit on the defendant.