The reaction ${\left({\mathrm{CH}}_3\right)}_2\mathrm{O}\left(\mathrm{g}\right)\to {\mathrm{CH}}_4\left(\mathrm{g}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)+\mathrm{CO}\left(\mathrm{g}\right)$follows first-order kinetics. The reaction is studied at constant volume with $p_0$ as the initial pressure of ${\left({\mathrm{CH}}_3\right)}_2\mathrm{O}$. If p is the pressure at time t, then a linear plot will be observed between