Tank $A$ is located within tank $B,$ each containing air. Pressure gage $A$ is located inside tank B and reads $2$ bar. The U$-$tube manometer connected to tank B contains mercury. The length of the mercury column $L=20cm.$ Determine the absolute pressures inside tank A in bar. The atmospheric pressure surrounding tank $B$ is $101$kPa.$g=9\mathrm{.}81$ m$/$s$^2.$ Remark: the pressure indicated by the gage $A$ is equal to $PA-PB.$ The density of mercury $=13\mathrm{.}59\frac{g}{c}{m}^3.$

a$.5\mathrm{.}3$ bar

b$.0\mathrm{.}8$ bar

c$.3\mathrm{.}3$ bar

d$.1\mathrm{.}6$ bar