Consider the examples below and state which constraints were violated and why? [All primary keys(pk) are underlined and foreign keys (fk) are shown with arrows from fk to pk ] Example 1 Example 7 1. Update the course_code of Database course from CSE370 to CSE390 in the Course table in Example 6. 2. Insert a row with the following values (1.5, 'Discrete') in the Course table in Example 6. 3. Delete the row from Student_Grades table in Example 6 where course_code = 'CSE110