Please solve these question in details and fully explaination. Thank you so much.

1 . In the figure the four particles form a square of edge length a = 7.00 am and have charges q, = 6.08 nc, q, = - 20.2 nc, 9, = 20.2 nc and qs = - 6.08nc. What is the magnitude of the net electric field produced by the particles at the square center? a O- a 2 . The figure shows an uneven arrangement of elections ( e ) and protons (p) on a circula are of Radius r- 2.15 m, with angles Of - 33.0', 0, = 53.0' and 04 = 29.0' a ) Find the magnitude and direction ( relative to the positive direction of the x - axis ) of the net electric field produced at the center of the arc ?" C P P 03 04 C