Can someone help me solve E, please explain and show work

IP Three charges are placed at the vertices of an Previous Answers equilateral triangle of side a = 0.90 m , as shown in the figure(Figure 1). Charges 1 and 3 are 6.6 uC charge 2 is -6.6 /C. Submitted, grade pending Part E Find the magnitude of the net force on charge s when it is at the ongin Figure Express your answer using two significant figures. 1 of 1 AEQ 12 ? 14 F - 1.92 N a/2 Submit Previous Answers Request Answer O Incorrect; Try Again; 4 attempts remaining 4/2 Provide Feedback