C = \(\frac{\text{Q}}{\text{V}}\) => Q = CV : ∴ V = \(\frac{\text{Q}}{\text{C}}\) ∴V\(_1\) = \(\frac{\text{Q}}{C_1}\); V\(_2\) = \(\frac{\text{Q}}{C_2}\); V\(_3\) = \(\frac{\text{Q}}{C_3}\) for series \(\frac{1}{\text{C}}\) = \(\frac{1}{C_1}\) + \(\frac{1}{C_2}\) + \(\frac{1}{C_3}\) = \(\frac{1}{2} + \frac{1}{6} + \frac{1}{3}\) = \(\frac{3 +1 + 2}{6}\) = \(\frac{6}{6}\) = 1 ∴ C = 1\muF = 1.0 x 10\(^{-6}\)F ∴ Q = CV = 1.0 x 10\(^{-6}\) x 12 = 12.0 x 10\(^{-6}\)C ∴V\(_1\) = \(\frac{\text{Q}}{C_1}\) = \(\frac{12 \times 10^{-6}}{2 \times 10^{-6}}\) = 6V V\(_2\) = \(\frac{\text{Q}}{C_2}\) = \(\frac{12 \times 10^{-6}}{6 \times 10^{-6}}\) = 2V V\(_3\) = \(\frac{\text{Q}}{C_3}\) = \(\frac{12 \times 10^{-6}}{3 \times 10^{-6}}\) = 4V ∴ 6V, 2V and 4V