The figure shows, in cross section, three conductors that carry currents through the plane of the figure. The currents have the values |1 = 3.24 A, 12 = 5.13 A, and 13 = 3.69 A, and the directions shown. What is the line integral & B . dl for path b going around the path in the counterclockwise direction? Enter your answer in scientific notation with three significant figures, i.e. 1.23*10^-3. 12 x 13