Clay soil deposited with $($OCR $=1)$ has been subjected to water table fluctuations. The lowest water table level was $6$ m below ground level, and the present water table is at $2$ m below ground level.

Assume clay to be fully saturated with a unit weight of $17\mathrm{.}5$ kN$/$m$^3.$

Determine the $($OCR$)$ at $2$ m$,6$ m$,$ and $15$ m below ground level. Please include a drawing of the water table.