Figure 1 shows a cross section of a coal loading facility on a port. Embankments (1), (2) and (4) support railway tracks on which a coal stacker reclaimer can travel. In Figure 1, the coal stacker reclaimer is on embankment (2) on which it imposes two line loads (L1 and L2), and the coal stockpile (3) is located in between embankments (2) and (4). It is assumed that the loading geometry of Figure 1 does not change. The soil profile under the ground surface (at elevation = 0m) consists of 3m of loose sand overlying 17 m of silty clay on an impermeable rock stratum. The water table is.at a depth of 1m (not shown on the figure). Some laboratory testing returned the parameters: Poisson's ratio for the sand and clay is 0.3 Young's modulus of the sand is 10 MPa Coefficient of compressibility of clay is 0.8 MPa-1 Void ratio of clay = 0.9, coefficient of consolidation = 12 m2 /y, coefficient of creep = 0.02. 1. The coal in the stockpile has a specific gravity of 1.5, a porosity of 45% and a volumetric water content of 14.5%. What is the bulk unit weight