3. Two long, parallel conducting wires carry current I1 = 1.5 A into the page and unknown current 12 out of the page. The two wires 1.0 m apart and located on x-z plane as shown in the figure below. [Answer in 2 significant figures] y (m) 11 12 x (m) -0.5 0 +0.5 a) What is the magnitude of 12 if the net magnetic field at the origin (0,0) is 1.0 HT pointing downward? b) Find out the location (x,y) where the net magnetic field B becomes zero