In the figure the battery has a potential difference

In the figure, the battery has potential difference V = 9.0 V, C2 = 3.0 uF, C4 = 4.0 uF, and all the capacitors are initially uncharged. When switch S is closed, a total charge of 12 uC passes through point a and a total charge of 8.0 uC passes through point b. What are (a) C1 and (b) C3?

[@Ellen_le567]

Can you solve the physics problems in Jee advance?! Plss 😊