1. You rent a car for a week. The contract states that for every additional day you keep the car after the week, the charge is $100.00. An unusually severe storm is forecast and you receive a text from the car rental agency that says all car renters can keep their vehicle an additional two days without extra charge. You return the car two days after the end of the week. The person who checks you in says you owe $200 for the extra two days. You show the text, but he says that the rental company changed its mind and will sue you. What defence could you raise? Describe what you need to prove. (2 marks)