Please answer all four of the questions below given case examples and citing statutes where necessary:
1. With reference to the case of Carlill v Carbolic Smoke Ball Company, explain the essential ingredients for a valid contract and why this case was considered a contract and not an invitation to treat.
2. With case examples explain what is meant by the consideration of a contract.
3. Give a description of the case Donoghue v Stephenson and what is meant by the ‘neighbour principle’.
4. How many tests are used to determine whether someone is employed or self-employed? Give a brief outline of these tests.
