6. Magnetic field (4 points) In a region of space is shown below, the magnetic field B is pointing in the -z direction X X X X P X X X X e N X X X X X O X X X X (a) (1 point) A proton is moving through the magnetic field with velocity v, in the x direction. What is the direction of the Lorentz force on the proton? (b) (1 point) An electron is moving through the magnetic field with velocity v . in the z direction. What is the direction of the Lorentz force on the electron? (c) (1 point) A straight wire at rest carries an electric current / in the y direction. What is the direction of the Lorentz force on the wire? (d) (1 point) A rectangular loop of wire is at rest in the magnetic field. If magnitude of the magnetic field starts increasing, is an electrical current induced in the loop? If so, in what is the direction