A multi$-$fluid manometer is connected to a pressure vessel containing Helium as snown. $5m^3$ and a thermocouple inserted into it measures $45C.$ How much Helium is contained by this pressure vessel? The ambient pressure, $P_{},$ that the manometer is open to is $101$ kPa $.($acceleration due to gravity, $g=9\mathrm{.}8\frac{m}{s^2})$

$\backslash$table$[[$Fluid$,$Density $(k\frac{g}{m^3})$