Lerato while taking her routine morning jog in her neighbourhood was attacked by Jabulani's fierce rottweiler dog, named Butch. Butch charged at Lerato unexpectedly. Lerato, a licensed firearm owner, fearing for her safety shot and killed Butch. Bearing the aforesaid in mind, answer the following questions: 1.1 purposes of delictual liability. (5) 1.2 Discuss with reference to authority whether Lerato may rely on private defence or necessity as a ground of justification if Jabulani wants to hold Lerato delictually liable for killing his dog. Comprehensively distinguish in your answer between the two grounds of justification, referring to their definitions as well as all their requirements, before arriving at a conclusion.