A variable capacitor is constructed using two half-circles of conducting material (radius r = 12.0 cm, with a gap between the plates of 2.00 mm. The capacitance is varied by adjusting the angle such that the effective area of the overlapping plates varies. If is increasing at a constant rate of 0.35 rad/s, how much charge is flowing (per second) onto the positive plate if the voltage applied across the plates is 19.0 V? Assume the capacitance is only due to the overlap region. Give your answer in pC/s (equivalent to picoamperes, pA). Recall that 1 pC = 10-12 C.