nswer the following questions with the greatest amount of detail possible: 1. Which stage of the Lewin model of change do you think is most often overlooked? Why? 2. What are the advantages and disadvantages of having an internal change agent rather than an external change agent? 3. How does organization development differ from organization change? 4. Which of the seven keys for successfully managing an organizational change effort seem to be the most difficult to manage? Why?