Please give me only one solution without AI or chatbot.

Four fixed point charges are located - as shown in the figure - on the corners of a rectangle. The charges are chosen so that 01 = Q4=QxandQ2=QS=Q=1nC.Qxis unknown. The distances between Q1 and Q2 and Q1 and Q4 are a = 5 m and 2d 2 4 m. The total electric field at the origin of the coordinate system (xmy) = (0,0) has a magnitude of E(0,0) = 5 Wm and is directed along the positive x- direction. a) Determine the electric field E_1 (magnitude and direction) generated by the charge Q_1 at the origin of the coordinate system as a function of the charge Ox. [2 points] b) Derive an expression for the total electric field E_g generated by the four charges at the origin of the coordinate system. [3 points] c) Determine the magnitude and sign of the charges Q1 2 Q4 2 OX. [2 points]