Two point charges, +Q and -Q are arranged on the x-axis at the coordinates (-a, 0) and (a, 0) as shown below. What is the electric potential at each of the 5 points with labelled coordinates? y (0, b) | (-2a, 0) (0, 0) (2а, 0) +Q (-а, 0) -Q (а, 0) (0, -b)i

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