According to the book, Kerzner, H. (2017). Project Management: A systems approach to Planning, Scheduling, and Controlling (12th ed.), provide answers to the following in one paragraph (250 words for each question) : 1. what is earned value management? What are its benefits when PM applied it to project management? 2. Why is it a challenge for project managers to track labour when resources are not 100% dedicated to a project? Explain your answer 3. Why might a project have a positive budget variance? Provide an example and explain your answer 4. A project manager distributes all communications to the team via email. What are the benefits and limitations with this approach? Explain your answer. 5. Is monitoring and control part of project life cycle? Why? Explain your answer? 6. What does it mean that resources and sponsors can feel that the project is 'out of control' when project managers do not follow the weekly cycle? Explain your