1. Create using Create_database(1).sql.
2. Open and run Schema2.sql to create the versioned schema.
3. Open and run Seed3.sql to insert data showing changed course HP and changed salaries.
4. Open and run Reports4.sql to verify that IV1351 P1 uses 7.5HP, and IV1351 P2 uses 15.0HP. Also verify that salary versioning affects costs (employee 2 has version 2 in P2 only).