$16$ M Plot $1$ in Fig. $25\mathrm{.}15q_{?}$ gives the charge $q$ that can be stored on capacitor $1$ versus the electric potential $V$ set up across it$.$ The vertical scale is set by $q_S=16\mathrm{.}0C,$ and the horizontal scale is set by $V_S=2\mathrm{.}0V.$ Plots $2$ and $3$ are similar plots for capacitors $2$ and $3,$ respectively. Figure $25\mathrm{.}15$b shows a circuit with those three capacitors and a $6\mathrm{.}0$ V battery. What is the charge stored on capacitor $2$ in that circuit?