Table name: TRUCK Database name: Ch03_TransCo Primary key: TRUCK_NUM Foreign key: BASE_CODE, TYPE_CODE Table name: BASE Primary key: BASE_CODE Foreign key: none Table name: TYPE Primary key: TYPE_CODE Foreign key: none FIGURE 1.3 The_TransCo Database Tables Problem 4: Do the tables exhibit referential integrity? Answer yes or no and then explain your answer. Write NA (Not Applicable) if the table does not have a foreign key