A flat site is underlain by three layers over rock. The top layer is an SP with thickness $=10$m$.$ The middle layer is a Chwith thickness $=4$m$.$ The bottom layer is a GP with thickness $=3$m$.$ A mid$-$layer sample of the CH reveals a recompressionindex of $0\mathrm{.}05,$ a compression index of $0\mathrm{.}32,$ a void ratio of $0\mathrm{.}95,$ and a preconsolidation stress of $200$ kPa. The water table is located on the ground surface. The site will be dewatered: the water table will be forced to drop $7$ meters. Calculate ultimate consolidation settlement associated with the dewatering process. Assume that the soil above the water table is dry.