Same as before.pick one to answer it and give me two extra example.thank you

1. When output volume increases, do fixed costs per unit increase, decrease, or stay the same within the relevant range of activity? Explain.

2.Nokiais thinking of expanding sales of its most popular cell-phone model by 65%. Do you expect its variable and fixed costs for this model to stay within the relevant range? Explain.

3.In cost-volume-profit analysis, what is the estimated profit at the break-even point?

4.How do step-wise costs and curvilinear costs differ?