An electron is shot into one end of the solenoid. As it enters the uniform magnetic field within the solenoid, its speed is 800 m/s and its velocity vector makes an angle of 30 degrees with the central axes of the solenoid. The solenoid carries 4.0A and has 8000 turns along its length. How many revolutions does the electron make along the helical path within the solenoid by the time it emerges from the solenoid's opposite end.