Which of the following statements are true?

*The magnetic field in the center line of a large solenoid is zero and increases toward the wires.
*The magnetic field inside a large solenoid is pointing perpendicularly toward or away from the center line, depending on the direction of the current.
*The magnetic field strength inside a large solenoid is independent of its cross-sectional area.
*The magnetic field of a current-carrying wire is directed parallel to the current.