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-(Figure: The Perfectly Competitive Firm II) Use Figure: The Perfectly Competitive Firm II.If this firm's MR curve is MR₂,then this firm's optimal output is _____ units of output and its economic profit will be _____.

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-(Figure: The Perfectly Competitive Firm II) Use Figure: The Perfectly Competitive Firm II.If this firm's MR curve is MR₂,then this firm's optimal output is _____ units of output and its economic profit will be _____.

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The profit-maximizing output for a perfectly competitive firm is where marginal revenue (MR) equals marginal cost (MC). In the given figure, the MR curve is MR₂. At the output level where MR=MC, the corresponding quantity is Q₂. At this output level, the firm's economic profit is zero. However, at any other output level, the firm's economic profit will be negative since the total cost of production will exceed the total revenue earned. Therefore, the only possible answer is B, where optimal output is Q₂ and economic profit is negative.

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