24-True ?-False ?: User-defined words are a fixed part of SQL and have a fixed meaning. 25-True D-False ?. If we store a person's surname as "SAMUEL" and then search for it using the string "Samuel", the row will not be found. 26-True -False:The HAVING clause is designed for use with the ORDER BY clause to restrict the groups that appear in the final result table. 27. True ?-False D: COUNT, SUM, and AVG apply to both numeric and nonnumeric fields. 28- True-False: A trigger defines an action that the database should take when some event occurs in the application. 29-Create an ER model for the following descriptions: Doctors, nurses, and patients have the following unique numbers respectively: doctorNo, nurseNo, and patientNo. A doctor can examine any number of patients; and each patient is examined by I doctor. A nurse can observe any number of patients; and a patient is observed by 1 or 2 nurses. A specialist nurse can supervise from 0 to 5 practical nurses; and each practical nurse can be supervised by I specialist nurse. - - - Each nurse reports symptoms to I doctor; and each doctor can receive symptom reports from many nurses