Help solving this problem ASAP

$(25\%)$ Problem $3.$ Water was pumped from an aquifer, shown in Figure P$3,$ for domestic

use. The original groundwater level was at the top of the soft $($NC: normally consolidated$)$

clay layer. After drawing water, the groundwater table drops $10m.$ Thus, the ground

subsides. All necessary information about soil layers is given in the figure.

a$)$ What are the values of pore$-$water pressure, total stress, and effective vertical stress

at a point in the midpoint of the clay layer before and after drawing water?

b$)$ Assuming the subsidence is due to the settlement of only the soft clay, estimate the

ultimate consolidation settlement of the ground surface.

Hint: notice the difference between the initial and final effective stress, causing

consolidation.

c$)$ A decision was made to recharge the aquifer by pumping the water back from a

canal nearby. If the groundwater table returned to its original level, would the

ground surface return to its original elevation or not, and why? Show your

calculation to support your answer, i$.$e$.,$ what is the swelling$/$rebound of the clay

layer if any?

Lightly cemented sand$/$gravel:

${}_d=15\mathrm{.}6k\frac{N}{m^3}$

${}_{\text{s}\text{a}\text{t}}=19\mathrm{.}5k\frac{N}{m^3}$

Clay:

${}_d=16\mathrm{.}2k\frac{N}{m^3}$

${}_{\text{s}\text{a}\text{t}}=20\mathrm{.}1k\frac{N}{m^3}$

$e_0=0\mathrm{.}9$

$C_c=0\mathrm{.}6$

$C_s=C_r=0\mathrm{.}05$

$c_v=0\mathrm{.}04\frac{m^2}{y}r.$

Aquifer sand and gravel:

${}_d=17\mathrm{.}2k\frac{N}{m^3}$

${}_{\text{s}\text{a}\text{t}}=20\mathrm{.}5k\frac{N}{m^3}$

Figure P$3$