The cross-sectional area of a conductive wire is 1.3Ɨ10⁻¹¹m². Assuming that the wire contains charged particles with a number density of 1.8Ɨ10²⁓ particles /m³, and each of these particles carries a charge of +, what is the drift speed of these charged particles (measured in m ) when an electric current of 1Ɨ10⁻⁓ is observed in the wire due to the motion of these particles?