Please complete $7\mathrm{.}27$ with the two groundwater depths at $10$ ft and $30$ ft instead of the $12$ ft and $20$ ft listed. Thank you kindly!!

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$\mathrm{.}27$ Figure P$7\mathrm{.}27$ shows the soil profile at a site where you plan to lower the water table. You have results from two consolidation tests, one from the upper $12ft$ thick overconsolidated crust, and another from the lower $32ft$ thick normally consolidated zone. You plan to lower the water table from its current $12ft$ depth to $20ft$ below ground surface. The consolidation properties for each layer are shown. Assume full capillarity.

a$.$ Compute the ${}_v^{\text{'}}$ in the middle of each layer before and after the water table is lowered.

b$.$ Determine the total settlement that will result from lowering the water table.

Figure P$7\mathrm{.}27$

Depth $($ft$)$