(1) Resistance sufficient to prevent the offense may be made by the person about to be injured:
(a)  To prevent an offense against his person, or his family, or some member thereof; or
(b)  To prevent an illegal attempt by force to take or injure property in his lawful possession.
(2)  A person acting pursuant to this section may use such degree and extent of force as would appear to be reasonably necessary to prevent the threatened injury. Reasonableness is to be judged from the viewpoint of a reasonable person placed in the same position and seeing and knowing what the person then saw and knew without the benefit of hindsight.