d P d ☑ d

Consider two two long, straight, parallel, current-carrying wires, separated by a distance d = 4.9 cm, as shown in the figure. The left wire is directed out of the page with current I₁, and the right wire is directed into the page with current I₂. The point P is a distance d from both wires, so the wires and the point form an equilateral triangle.   

a) If both wires are carrying a current of 6.5 A, what is the magnitude of the magnetic field, in teslas, at point P? 

b) If the current from the left wire is 6.5 A and the current from the right is 14 A, what is the magnitude of the magnetic field, in teslas, at point P?