Q$-4(25\%)$: For the flowing foundation below calculate:

$1-$ The elastic settlement under the center of rectangular rigid foundation with a dimension $1m2m$ and placed at $1$ m below the ground level as shown in the figure below.

$2-$ The secondary consolidation settlement after $10$ years of applying the load $($ note that the time for completion of primary settlement $4$ years$)$

$C_{}=0\mathrm{.}03$

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

$e_p=0\mathrm{.}75$

$3$m