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6. Explain why it is important to document your assumptions when developing a cost estimate? Explain why data normalization is required when utilizing data from multiple sources. Name one common method to normalize historical cost data. 7. 8. Discuss three cost estimating challenges that you could encounter when developing the cost estimate for the tallest building in the world 9. Why would you want to update an estimate? 10. What is the first step in developing a cost estimate? 11. Cite, in order, the twelve "Cost Estimating" steps. Which of the twelve steps do you think is the most important and why