$0.500\mathrm{mol}$ of a gas with $a=5.46{\mathrm{L}}^2\mathrm{atm}\mathrm{mo}{\mathrm{l}}^{-2}$ and $b=0.0305\mathrm{L}\mathrm{mo}{\mathrm{l}}^{-1}$ is confined to $0.400\mathrm{L}$ at $350\mathrm{K}$. The van der Waals pressure in atm (two decimals, $R=0.0821\mathrm{L}\mathrm{atm}{\mathrm{K}}^{-1}\mathrm{mo}{\mathrm{l}}^{-1}$) is

Numerical answer type, answer in atm, tolerance 0.03.