Hello: I am having trouble starting this problem. "20.0 m long copper wire, 2.30 mm in diameter including insulation, is tightly wrapped in a single layer with adjacent coils touching, to form a solenoid of diameter 2.50 cm. What is the field at the center when the current in the wire is 26.0 A? Give the field in Teslas." I figured I would need to use these equations: Not sure where to start... Any help would be greatly appreciated.