Calculate the equilibrium conversion, concentrations, and final pressure for the gas$-$phase reaction Aharr$3C$ with initially pure $A$ at $T=400K,P_0=10$atm and $K_C=0\mathrm{.}25(\frac{\text{m}\text{o}\text{l}}{L}{)}^2$ in a constant$-$volume, isothermal batch reactor. Please assume A and $C$ are both ideal gases under these conditions.