What are the primary advantages and disadvantages of using a Pre Operating System (no OS)? 1) Advantage: Allows direct access to hardware. Disadvantage: Lack of user-friendly interface. 2) Advantage: Faster execution of programs. Disadvantage: Limited functionality. 3) Advantage: Lower resource requirements. Disadvantage: Difficult to develop and maintain. 4) Advantage: Greater control over system resources. Disadvantage: Incompatibility with modern software.