A circuit constructed from two batteries and two wires, as shown in the Figure below. Each battery has an emf of 1.3 V. Each wire is 46 cm long and has a diameter of 0.0007 m. The wires are made of a metal that has 7 × 10^28 electron/m^3 mobile electrons per cubic meter; the electron mobility is 5 × 10^-5(m/s)/(V/m). A steady current runs through the circuit. The locations marked by "x" and labeled by a letter are in the interior of the wire. How many electrons per second enter the positive end of the battery 2? Answer in units of electrons/s