Question: please help explain in steps thoroughly, thank you 4. Consider an equilateral triangle of side length 18 cm. A charge of +2.0 nC is positioned

please help explain in steps thoroughly, thank you

4. Consider an equilateral triangle of side length 18 cm. A charge of +2.0 nC is positioned at the top vertex and two charges, -4.0 nC each, sit at the bottom vertices, as shown in the diagram. Determine the magnitude and direction of the electric field at the centre of the triangle. +2.0nC -4.0nC -4.0nC 18 cm

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