Cost Behaviour and Firms Profitability, Discussion board question help

1.Chapter 3 is entitled “cost behavior” and deals with how an accountant who works for an organization can examine and analyze different aspects of costs. Assume you are a CFO, and your CEO has asked you to give him/her a briefing on why he/she should be interested in how a cost behaves. What do you explain to the CEO? Pleasse give a brief discussion of why you believe cost behavior should be a part of information made to the CEO. 2.In general, three methods of estimating costs are discussed in Chapter 3. Please describe the three methods and give advantages and disadvantages to all. Which of the three methods would you use, given that your boss wants a very quick description of a cost’s behavior for planning/decision making?