(Solved): The total magnetic flux density vector formed at the origin due to two wires of length 2L, parallel ...

The total magnetic flux density vector formed at the origin due to two wires of length 2L, parallel to the z-axis carrying direct currents 21 and I, respectively, placed with their centers at x=0, y=r, z=0 and their centers at x=0, y=-r, z=0, as shown in Figure 2: a) Find the magnetic vector potential using (A) (Hint: Cylindrical coordinate solution). b) If L, what would be the result you found in part a)?