The gas phase reaction:$A+B{}_{k_2}^{k_1}2C+D$

is carried out in a PFR reactor where the feed of the reactants is equimolar at $250\backslash$deg C and $2$atm. At this temperature, $1=0\mathrm{.}3($dm $3$ mol$)$ min$1$ and $2=0\mathrm{.}08($dm $3$ mol$)2$ min$1.$Determine the equilibrium conversion, $,$ and the concentration of the species at equilibrium $($inmol$/$dm$3)$