Moving Charges And Magnetism

A, B and C are three parallel conductors of equal lengths carrying currents \(\mathrm{I}, \mathrm{I}\) and \(2 \mathrm{I}\) respectively. Distance between A and B is '\(x\)' and that between B and C is also '\(x\)'. \(F_1\) is the force exerted by conductor \(\mathrm{B}\) on \(\mathrm{A}\). \(\mathrm{F}_2\) is the force exerted by conductor \(\mathrm{C}\) on \(\mathrm{A}\). Current \(\mathrm{I}\) in \(\mathrm{A}\) and \(\mathrm{I}\) in \(\mathrm{B}\) are in same direction and current \(2 \mathrm{I}\) in \(\mathrm{C}\) is in opposite direction. Then