The point charges A. B, C and D each have the same magnitude charge of 6.5 mi. Two of the charges are positive as shown and two are negative. The corners of the square are 10.0 cm apart. A B 10.0 cm C D {a} Find the net electric force on Charge A. State 1your the final direction relative to the sides of the souareJITr1r marks} {h} Find the total electric potential at the centre of the square produced by the system of charges. Show 1your work. [2 marks}