1. Under what DBMS function, the database still handles all of the physical data characteristics but hides that complexity from the users and programs? 2. Does a database display data to a user (or present to a program) in a logical or physical data format? Or both? 3. Sometimes, a change to the data type can affect a program's ability to run or fail. For example, changing a field from a character to a numeric would cause a program to fail if the program exhibited what? 4. In a system using a database, this same change has occurred and the programs using the student data ran perfectly and remain unaffected. This is because of what? 5. A file-based computer information system is being used. A change has been made to the student data file used in several programs to add an emergency contact. Upon this change, the programs that use the file have failed. This means that the programs exhibit what?