Three capacitors c1 c2 and c3nbspwhose values are 10microf

Question

Three capacitors C₁, C₂, and C₃ whose values are 10µF, 5µF and 2µF respectively, have breakdown voltages of 10V, 5V and 2V respectively. For the interconnection shown, the maximum safe voltage in Volts that can be applied across the combination and the corresponding total charge in µC stored in the effective capacitance across the terminals are respectively