4. Marcus is using his mobile phone and also practicing his juggling routine while driving home from work one evening. He loses control as his car runs through a red light and flips over against an embankment. Marcus is thrown from the car. Sally is driving home from her first aid training class and pulls over to help Marcus, neglecting in her haste to park her car carefully out of the stream of traffic. A minute later Catherine, who is speeding in her car on the way home, attempts to avoid Sally's car and in so doing she strikes Sally as Sally is administering CPR to Marcus. Sally is seriously injured. Discuss whether or not a duty of care is owed and explain your reasons