As shown in the figure below, when a charged particle enters a region of magnetic field traveling in a direction perpendicular to the field, it will travel in a circular path. If the magnitude of the magnetic field is 0.190 T, the speed of the particle is 12.0 x 106 m/s, the radius of the trajectory of the path is 106.7 cm, and the charge has a magnitude of 3.20 x 10-19 C, determine the following. (a) sign of the charged particle O positive O negative (b) mass of the particle (use the conversion 1 u = 1.66 x 10-2 -27 kg)