Figure a show, in cross section, two wires that are straight, parallel, and very long. The ratio i1/i2 of the current carried by wire I to that carried by wire 2 is 1/3. Wire 1 is fixed in place. Wire 2 can be moved along the positive side of the x axis so as to change the magnetic energy density u B Set up by the two currents at the origin. Figure b gives u B as a function of the position x of wire 2 .The curve has an asymptote of u B = 1.96nJ/m3 as x ??, and the horizontal axis scale is set by x s = 60.0 cm. What is the value of?(a) i 1 and(b) i 2?

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(a) (b) x (cm) ig (n)/m)