The applet displays the motion of both in a magnetic field (red lines). In the upper part of the screen the motion is shown in 2D and in the lower part of the screen the full 3D motion of a charged particle in the magnetic field is shown. Set the y and the z components the velocity to zero. 5. Which of the two particles is positive? 6. Which of the two particles is negative? Press play and watch the motion in 2D. 7. What direction does the positive particle rotate? 8. What direction does the negative particle rotate? Set the z components the velocity to 1m/s 9. What shape do the particles trace out as they move in 3D