1. The problem statement, all variables and given/known data In the figure, four charges, given in multiples of 5.00×10-6 C form the corners of a square and four more charges lie at the midpoints of the sides of the square. The distance between adjacent charges on the perimeter of the square is d = 1.30×10-2 m. What are the magnitude and direction of the electric field at the center of the square? The magnitude of E? Ex? Ey? 2. Relevant equations Magnitude of Electric Field at point r: E=F/q0=(kQ)/r^2 F=k(Qq0)/r^2 3. The attempt at a solution The equations are ones I found in the textbook, but I'm not entirely sure how to use them or even if they would work for this particular problem. To find the charge on each charge, would I take the number of q's written next to it and multiply that by 5.00×10-6 C ? Would that become Q?