please solve quickly

Part A A 10.0-cm-long wire is pulled along a U-shaped conducting rail in a perpendicular magnetic field. The total resistance of the wire and rail is 0.300 $2. Pulling the wire at a steady speed of v = 4.00 m/s How big is the pulling force? causes 3.60 W of power to be dissipated in the circuit. Express your answer with the appropriate units. View Available Hint(s) F = Value Units Submit Part B What is the strength of the magnetic field? Express your answer with the appropriate units. >View Available Hint(s) B Value Units Submit