If $PA=8$ bar, $P2=\frac{12}{b}ar,P3=\frac{4}{b}ar,$ and Patm$=1\mathrm{.}01$ bar, what is the value

of $P?$

$20$ bar

$15$ bar

$8$ bar

$2$ bar$-$vacuum

$4$ bar$-$vacuum

$24$ bar