In the figure V=10V, C1=10uF, and C2=C3=20uF

In the figure, V = 10 V,C1 = 10 mF, and C2 = C3 = 20 mF. Switch S is first thrown to the left side until capacitor 1 reaches equilibrium. Then the
switch is thrown to the right. When equilibrium is again reached, how much charge is on capacitor 1?

[@barselci5364]

thank you

[@richardl6751]

And the voltage will be 2 volts. That wasn't part of the question but it can be part of the answer.