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Three point charges ?1 = 5.00 ??, ?2 = −4.00 ??, and ?3 = 7.00 ??...

Three point charges ?1 = 5.00 ??, ?2 = −4.00 ??, and ?3 = 7.00 ?? lie in an x-y coordinate system with coordinates ? = (1, 1), ? = (2, 2), and ? = (4, 1) where the coordinate positions have units of meters. Determine (a) the net force on charge ?3 in unit vector notation, (b) the electric potential at the origin, and (c) the work necessary to assemble this charge distribution. Give numerical results with appropriate units for each response. (15 points)

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