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Figure 4-11 ↑price 20 18 16 24 12 10 8 6 4 Firm A os 20 18 16 14 12 10 8 6 4 2 price Firm B 7 2468 10 12 14 16 18 20 quantity 2 4 6 8 10 12 14 16 quantity Refer to Figure 4-11. If these are the only