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STEP: 1 of 3 Sparkle is one firm of many in the market for toothpaste, which is in long-run equilibrium. Indicate which of the following graphs accurately reflects Sparkle's demand curve, marginal-revenue (MR) curve, average-total-cost (ATC) curve, and marginal-cost (MC) curve. (? (?) B Demand Price, Cost, Revenue Demand ATC Price, Cost, Revenue ATC MC MC MR MR Quantity of Sparkle Toothpaste Quantity of Sparkle Toothpaste O A O BSTEP: 2 of 3 The following graph shows Sparkle's demand curve, marginal-revenue (MR) curve, average-total-cost (ATC) curve, and marginal-cost (MC) curve. Use the black point (plus symbol) to indicate Sparkle's profit-maximizing output and price. Demand Profit Max Price, Cost, Revenue ATC MC MR Quantity of Sparkle Toothpaste True or False: Sparkle's profit is zero. O True O False