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A dry sand 51 m thick has an in-situ dry unit weight of 13 kN/m^3. Using vibroflotation, the surface settled by 0.5 m The relative density of the sand after this compaction technique yields 85%. If the dry unit weight of this dry sand in the loosest state is 10.8 kN/m^3. Determine: 1. The dry unit weight in kN/m^3 after vibroflotation (2 decimal places) 2. The dry unit weight in kN/m^3 at the densest state (2 decimal places) 3. Maximum possible settlement in meters of the surface under ideal compaction (2 decimal places)