Consider the figure above. Take d = 4.70 m, q = 1.40×10−3 C, and v′ = v = 10.0 m/s. (a) Determine q′ if the net magnetic field at P is zero. Preview C (b) Determine the magnitude of the the net magnetic field at P if q′ = 2q. Preview T (c) Determine the direction of the net magnetic field at P if q′ = 2q. Upward Downward Rightward Leftward Into the page Out of the page None of the above