A Long Solenoid (1 000 Turns/m)carries a Current of 25 $\mu$

A long solenoid (1 000 turns/m) carries a current of 25 mA and has an inside radius of 2.0 cm.A long wire which is parallel to and 4.0 cm from the axis of the solenoid carries a current of 6.0 A.What is the magnitude of the magnetic field at a point on the axis of the solenoid?

A) 51 $\mu$ T
B) 61 $\mu$ T
C) 43 $\mu$ T
D) 81 $\mu$ T
E) 1.4 $\mu$ T