The circuit of Figure shows a capacitor, two ideal batteries, two resistors, and a switch S. Initially

Question:

The circuit of Figure shows a capacitor, two ideal batteries, two resistors, and a switch S. Initially S has been open for a long time. If it is then closed for a long time, what is the change in the charge on the capacitor? Assume C = 10?F, ?₁ = 1.0 V, ?_2?= 3.0 V, R₁ = 0.20?, and R₂ = 0.40?.