In the figure, two long straight wires at separation d-11.8 cm carry currents of is-5.84 mA and is -4.00 is out of the page. (a) At what coordinate on the x axis in centimeters is the net magnetic field due to the currents equal to zero? (b) If the two currents are doubled, is the zero-field point shifted toward wire 1, shifted toward wire 2, or unchanged? (a) Number (b) Units