Explain following :

• Explain the main long term trends affecting the nature of work
• Explain the shift from the "three stages life model" to the "multistage life model"
• Explain why "intangible assets" (productivity, vitality and transformation) are becoming more important than the traditional "tangible assets" (saving, property and pension)
• Explain the three stages (freeze, unfreeze and refreeze) of organizational change