1. In free space, there are two point charges of Q₁= 2q and Q₂ = 6q located at (0, 2r, r) and (r, 0, 3r) in rectangular (Cartesian) coordinate system. What is the magnitude of the force experienced by Q₂?
(A)
(B)
(C)
(D)
(E)None of the above

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