Refer to the figure below. There are four point charges with charge of q1=-4×10^-6C, q2=-12×10^-6C, q3=-6×10^-6C, q4=8×10^-6C arranged in equal sides with r as 0.7m. a) calculate for the amount of electric force experienced by q3 due to the other charges.b) What will be its direction?

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