After 05 sec what will be the voltage between the positive

Question

When the circuit at below is first attached to a battery, charge will start to accumulate on the capacitors, and hence create a voltage.

v₀ = 5 Volts, R_eq = 5MΩ, and C_eq = 2μF and the initial charge on all the capacitors is zero.

After 0.5 sec what will be the voltage between the positive terminal and point A?. Hint: first calculate the final, long term, equilibrium charge (q₀) on C_eq.