Question 16 4 Points Consider the following PL/SQL script: SET SERVEROUTPUT ON BEGIN INSERT INTO COURSE (course_no, description, created by, created-date, modified by, modified_date) VALUES (course no_seq. nextval, database development', USER, SYSDATE); COMMIT DBMS OUTPUT.PUT LINE ('One course has been added' ); END; Assumptions: All the COURSE table fields have check constraints defined on them indicating that none can be null. 1. Explain why the script does not execute successfully. (2 points) 2. Add a user-defined exception to the script, so that the error generated by the INSERT statement is handled. Assign the code 2290 to this exception. (2 points) Use the editor to format your answer Question 17 1 Point nutes remaining