The ground water level is at $5$ m $(15$ ft$)$ from the surface. At a depth of $8$ m $(25$ ft$),$ a sample of the clay was extracted

and tested in an oedometer. The following results were obtained:

Vertical

effective stress$-$k Pa $($ksf$)$

$800$

$(16)$

$400$

$(8)$

$800$

$(16)$

$1600$

$(32)$

Calculate $($a$)$ uncorrected Co $($b$)$ corrected Cc based on

Schmertmann's method, $($c$)$ the corrected A$.,($d$)$ Cn $($e$)$ CT~c$\text{'}$

and $($f$)$ OCR. The initial water content of the soil is

$34\%$