answer these 4 questions._x000D_
1. It€™s been said that 50-70% of life cycle costs are committed during the early phases of systems development. What are those phases and discuss why this situation exists._x000D_
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2. A CBS is an important tool used in the planning and execution of a systems development and use. What are the components of a CBS and how is it used?_x000D_
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16-3 Humanity is sustained by both technological services and ecological services. Explain._x000D_
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16-4 List some of the factors and incentives promoting €œgreen engineering.€_x000D_
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17-1. Define life-cycle cost in your own words. What is included (excluded)?_x000D_
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17-3.Why is life-cycle costing important?_x000D_
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