1). The results of a standard compaction test on a soil (G₁ = 2.7) are as shown in the table below. w (%) y (kN/m³) 6.2 8.1 9.8 11.5 12.3 13.2 16.9 18.7 19.5 20.5 20.4 20.1 a) Determine the maximum dry unit weight and optimum water content. b) Determine the degree of saturation at the maximum dry density. c) Plot the zero air voids curve. d) A modified proctor test performed on the same specimen resulted in the optimum water content being 3% less than that obtained in the standard proctor. What would be the corresponding maximum dry unit weight? State clearly how you arrived at your solution.