please answer all and show work

1. Margin of Safety is A. The same as breakeven B. The ratio of fixed costs to variable costs C. Actual Sales - Breakeven sales D. The amount of sales a company needs to be profitable E. Sales - Variable Sales 2. Max Machining incurs the following total utilities costs at different levels of production: How would utility costs be properly classified? A. Fixed B. Variable C. Mixed D. None of the above 3. If costs are linear, A. Costs should be grouped in a line from highest to lowest B. There is a relationship between the activity and the costs plotted on the graph C. Costs must be variable. D. All of the Answers are true 4. Which method of estimating variable and fixed costs is generally considered the most accurate? A. High-low method B. Scattergraph method C. Least-squares regression method D. All of the above E. None of the above