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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Enter the question # you have chose at the start of each answer so that others know what question you have chosen. (i.e. Q2, Q4, Q5)

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.