At the site where the sample of Problem 8.18 was taken, the soil profile consists of about 6.5 m of sand and rubble fill and then 9.1 m of clay. The water table is about 1.8 m below the ground surface. Average densities of the sand and rubble fill are 1.45 Mg/m3 above the water table and 1.70 Mg/m3 below the water table. Estimate the consolidation settlement if the average stress increase in the compressible layer is:

(a) 50 kPa

(b) 100 kPa

(c) 250 kPa.