How much work is required to set up the four-charge configuration of the figure if q = 3.83 pC, a = 53.3 cm, and the particles are initially infinitely far apart and at rest?

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How much work is required to set up the four-charge configuration of the figure if q = 3.83 pC, a = 53.3 cm, and the particles are initially infinitely far apart and at rest? + + -q Number i Units