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