$X:2S{O_2} + {O_2} \rightleftharpoons 2S{O_3}$
$Y:PC{l_5} \rightleftharpoons PC{l_3} + C{l_2}$
$Z:2HI \rightleftharpoons {H_2} + {H_2}$
$\mathrm{X} \rightleftharpoons \mathrm{Y} ; \mathrm{K}_1=1.0$
$\mathrm{Y} \rightleftharpoons \mathrm{Z} ; \mathrm{K}_2=2.0$
$\mathrm{Z} \rightleftharpoons \mathrm{W} ; \mathrm{K}_3=4.0$
$\mathrm{x} \rightleftharpoons \mathrm{w}$ પ્રક્રિયા માટે સંતુલન અયળાંક શોધો.