The irreversible liquid phase reaction

$2A+4B2C+2D$

takes place in an isothermal CSTR reactor. The reactor operates at a constant temperature of $381K.$ The concentration of $A$ is $0\mathrm{.}27mo\frac{l}{d}{m}^3.$ The feed contains A and $B$ only in the molar ratio $2$:$4\mathrm{.}9.$ The reaction is $1$ order with respect to species A and $0$ order with respect to species $B,$ with reaction rate $k=1\mathrm{.}2d\frac{m^3}{m}ol.s$ at $350K,$ and the activation energy, $E=32,425\frac{J}{m}ol.$

Write the reaction over with the limiting reagent as the basis $(8$ marks$)$

Calculate the value of the rate constant $k$ at the temperature $381K(4$ marks$)$

Write out the rate law and calculate the value of the rate of disappearance of the limiting reagent $(6$ marks$)$