Question One (1)Green Energy, Inc. is a monopoly subject to high barriers to entry. Its marginal cost is $90 and average cost is $120. A recent market study has determined that the price elasticity of demand is 1.25. Determine the price that the company is most likely to set.

Question Two (2)The demand and supply curves in a perfectly competitive market are given by (for ) and (for ), respectively. A representative firm's cost is captured with the following equations:

1. Determine the equilibrium price and quantity in the market.
2. Given the cost functions of the representative firm, find the profit-maximizing level of production (quantity), total revenue, total cost, and profit for the firm in equilibrium.
3. Given the cost functions of the representative firm, determine the minimum price required for a new firm to enter the market.

Question Three (3)An analyst gathers the following market share data for an industry:

Company	Sales (in millions)
XYA	500
XYB	400
XYC	350
XYD	120
XYE	90
All others	80

Determine the industry's four-company concentration ratio.Question Four (4)An analyst gathers the following market share data for an industry:

Company	Market Share (%)
ABV	40
ABW	30
ABX	15
ABY	7
ABZ	8

Determine the industry's three-firm Herfindahl-Hirschman index.