Figure shows charge ($q$) versus voltage ($V$) graph for series and parallel combination of two given capacitors. The capacitances are:\\
(1) $60 \mu \mathrm {~F}$ and $40 \mu \mathrm {~F}$\\
(2) $50 \mu \mathrm {~F}$ and $30 \mu \mathrm {~F}$\\
(3) $20 \mu \mathrm {~F}$ and $30 \mu \mathrm {~F}$\\
(4) $40 \mu \mathrm {~F}$ and $10 \mu \mathrm {~F}$