A red ball has a charge of -0.0003117 C. A blue ball with a +0.0004095 C charge

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Question:

A red ball has a charge of -0.0003117 C. A blue ball with a +0.0004095 C charge is 3.0 meter east of the red one. A green ball with -0.0004785 C charge is 4.0 m north of the red ball. (You should draw a sketch for yourself to visualize the problem). Calculate the x-component of the electric force on the green ball