Suppose that production of 1 unit of mining requires 5/7 unit of mining, 1/7 unit of manufacturing, and 1/7 unit of communication. To produce 1 unit of manufacturing requires 3/7 unit of mining, 2/7 unit of manufacturing, and 2/7 unit of communication. To produce 1 unit of communication requires 0 units of mining, 4/7 unit of manufacturing, and 3/7 unit of communication. Find the ratio of the three commodities in the closed model.

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