In the figure shown below, compute the pressure difference between $1$ and $2$ in kPa$(P1-P2)$ when Fluid A is brine $(s=1\mathrm{.}15),$ the

gate fluid is oil $(s=0\mathrm{.}92)$ and $z=1\mathrm{.}1$ meters.

$-16\mathrm{.}68$kPa

$-18\mathrm{.}28$kPa

$-9\mathrm{.}81$kPa

$($D$)-9\mathrm{.}32$ kPa