please answer any 4 questions 80 words any of the following with references and no plagiarim.

 
Create a thread and answer 3 of the following questions 
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1. Describe Prototyping.
2. Describe Agile Modeling.
3. Describe SCRUM.
4. Compare Agile Models versus Structured Methods.
5. Describe the Risks Inherent in Organization Innovation.
6. Describe Data Flow Diagrams.
7. Compare Logical versus Physical Data Flow Diagrams.