A semi$-$batch reactor initially with $50$ liters is used to process the following set of elementary multiple reactions in an isothermal manner:

$A+BC,k_1=2\mathrm{.}019$

Charr$2E,k_2=0\mathrm{.}850,k_{-2}=0\mathrm{.}57,$ Where $k_2$ is the rate constant of the forward reaction and $k_{-2}$ of the return reaction.

$2$AharrD,$k_3=0\mathrm{.}900,k_{-3}=0\mathrm{.}043$ Where $k_3$ is the rate constant of the forward reaction and $k_{-3}$ of the return reaction.

At the beginning of the reaction