Which of the following contracts must be in record form (i.e. legal writing) to be enforceable? Please explain each.

1. A contract for the sale of 1 acre of land for $400

2. A contract for managementconsulting for 6 months for $353,000

3. The sale of a car for $358

4. A contract for a loan co-signed/guaranteed by a corporation's vice-president

5. A contract for the sale of a mobile home for $12,000