Two infinitely long, parallel wires are lying on the ground a distance apart as shown in the figure. Athird wire of length and mass $,$ carries a current of and is levitated above the first two wires, at ahorizontal position midway between them. The infinitely long wires carry equal currents in the samedirection, but in the direction opposite that in the levitated wire. What current must the infinitely longwires carry so that the three wires form an equilateral triangle?