The drawing shows the potential at five points on a set of axes. Each of the four outer points is 6.2 x 10-4 m from the point at the origin. From the data shown, find the magnitude of the electric field in the vicinity of the origin.

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The drawing shows the potential at five points on a set of axes. Each of the four outer points is 6.0 × 10-3 m from the point at the origin. From the data shown, find the magnitude and direction of the electric field in the vicinity of the origin.