Related to (( SOIL MECHANICS )) subject:-

Please i need a correct answer of this question, only correct one!!!

Please Make A), B), C) too clear.

A 7 feet layer of clay is buried beneath a 10 feet stratum of very compact granular soil. Compact
sand underlies the clay. The layer of granular soil is composed of material having a unit weight
of 130 pcf. The clay unit weight is 105 pcf. A laboratory compression test on a sample of the
clay indicates a compression index of 0.40 and a natural void ratio of 1.30. A planned building
loading will cause a 550 psf of stress increase at the middle of the clay layer.

a) What amount of primary compression occurs in the clay layer for the indicated
conditions?

b) How much primary compression of the clay layer would result if the groundwater table
was at the ground surface (all other conditions remain the same)?

c) How much clay layer compression would occur if the clay was an overconsolidated
material, the past maximum pressure was 2,000 psf, and the Cr value was 0.10?
Assume a deep water table.