In the figure, the four particles form a square of edge length a 5.50 cm and…

In the figure, the four particles form a square of edge length a 5.50 cm and have charges q1 = +35.0 nC, q2 =-70.0 nC, q3 = +70.0 nC and q4 35.0 nC. What net electric field do the particles produce at the square’s center? N/C 41 92 94 1s