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9) [8 pts] The work (per unit charge) done by the electric field from A=(0,0) to B=(a,b) inside of two uniformly charged planes with surface charge densities o and-o as shown is 0 A) 2 -a [3] B) [2] B Kľ A -2E00 a 으아 [8] C) 80 D) - a [4] √a² + b² E) 0 -√a² + b² F) Eo —— €0