Two circular current loops (with R1 = 1.0 m and R2 = 2.0 m) are centered at the origin and lie flat in the x-y plane. The current in the inner loop is 1 A in the clockwise direction. The current in the outer loop is 2 A in the counterclockwise direction. Use the superposition principle to find the magnetic field (both direction and magnitude) at the common center of the two loops.