Integrity Constraints Consider the following relational schema. An employee can work in more than one department; the act time field of the Works relation shows the percentage of time that a given employee works in a given department. Empleid, integer, ename; string, age: integer, salary: real) Works(eid; integer, did: integer, pct time: integer) Dept(did: integer, budget: real, managerid; integer) Write SQL integrity constraints (domain, key, foreign key, or CHECK constraints; or assertions) or SQL triggers to ensure each of the following requirements, considered independently. 1. Employees must make a minimum salary of $1000. 2. Every manager must be also be an employee. 3. The total percentage of all appointments for an employee must be under 100%. 4. A manager must always have a higher salary than any employee that he or she manages. 5. Whenever an employee is given a raise, the manager's salary must be increased to be at least as much. 6. Whenever an employee is given a raise, the manager's salary must be increased to be at least as much Further, whenever an employee is given a raise, the department's budget must be increased to be greater than the sum of salaries of all employees in the department