Two parallel, circular loops carrying a current of 40 A

Two parallel, circular loops carrying a current of 40 A each are arranged as shown in Fig. 5-39 (P5.14). The first loop is situated in the x–y plane with its center at the origin and the second loop’s center is at z = 2 m. If the two loops have the same radius a = 3 m, determine the magnetic field at:
(a) z =0,
(b) z =1 m,
(c) z = 2 m.