Estimate the average drift speed of conduction electrons in a copper wire of cross-sectional area 1 x 10⁻7 m² carrying a current of 1.5 A. Assume the density of conduction electrons to be 9 x 10²8 m⁻3

a) 0.05 m/s
b) 0.5 m/s
c) 5 m/s
d) 50 m/s