Label each of the following statements as describing a Model, Schema, or Application-based constraint. 1. Over the period of a year, an employee cannot move between more than two projects. 2. An employees salary cannot exceed 200,000.00. 3. Every employee in the enterprise is represented in a single tuple in the Employee relation. 4. The description of an employee is limited to the attributes in the Employee relation. 5. An employees salary cannot exceed that of the employees department manager.