Three point charges +3 μC, +4 μC, and -7 μC are placed along the x and y axis with the values and positions shown. What is the net force, magnitude and direction, acting on the +4 μC charge?
(a) 198 N, 37° above +x axis
(b) 298 N, 47° above -x axis
(c) 342 N, 53° above +x axis
(d) 305 N, 53° below +x axis
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