Successful liability in negligence

W​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​ith reference to case law, discuss all four requi​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​rements for a successful liability in negligence​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​.