What could be the possible error of the given code below? DECLARE v_sum_sal NUMBER(10,2); v_deptno NUMBER NOT NULL : =60; BEGIN SELECT SUM(salary) INTO v_sum_sal FROM employees WHERE department_id = v_deptno; DBMS_OUTPUT.PUT_LINE('Dep \#60 Salary Total: ' || v_sum_sal); END; Query returns more than 1 row No error Group function error Variable error What could be the possible error of the given code below? DECLARE v_sal_increase employees.salary\%TYPE := 800; BEGIN UPDATE copy_emp SET salary = salary +vsal_increase WHERE job_id = 'ST_CLERK'; END; SET section No error Variable declaration WHERE section The code below must print the number of rows deleted. What is missing in the given code to satisfy the output? DECLARE v_deptno copy_emp.department_id\%TYPE := 50; BEGIN DELETE FROM copy_emp WHERE =vdeptno; DBMS_OUTPUT.PUT_LINE(SQL\%ROWCOUNT \|| ' rows deleted.'); END; DEPARTMENTS JOB_ID DEPARTMENT_ID JOBS