Consider the graph below. The demand curve represents market demand, and the MC and ATC curves pertain to a single rm. Suppose this rm is the only rm currently operating in the market. $ Demand MC ATC 2.1 Suppose the firm chooses not to charge a markup above marginal cost. Highlight the rm's supply curve in this scenario on the graph above. 2.2 Assume all possible entrants to this market share the same cost structure as the rm in 2.1. Explain why perfect competition would not be sustainable in this market