Employees (employee_id, first_name, salary) Using employees table. Write a function that will accept ID and name of an employee from the calling environment, the function should insert the new employee, If the employee inserted successfully, the function should send 0 to the calling environment, otherwise it should send 1. Handle exceptions if any errors occurred. Hint: (Dup_val_on_index). employees (employee_id, first_name, salary) Write a trigger that will be fired when updating the salary of employees, the trigger will be able to display the old salary and the new salary of the employees updated and the amount of change in the salary. Hint: use OLD and NEW qualifiers. employees (employee_id, first_name, last_name, hire_date, salary) Write a procedure that will identify the employee who gets the minimum salary and passes the ID of that employee to the anonymous block in order to display the information of that employee (last_name, salary, hire_date). Using employees table. Hint: use group function min. Your answer should include the procedure block and the anonymous block