A particle of charge 23 mC and mass 1.3 10^-16 kg moves at a speed of 2000 m/s, and its velocity vector lies in the x–y plane. There is a magnetic field of magnitude 0.88 T along the  +z direction. The magnetic force on the particle causes the particle to move in a circle that lies in the x–y plane.
(a) Find the radius of this circle.
(b) Find the period of the motion.
(c) If the particle is moving parallel to +y at t = 0, is the circular motion clockwise or is it counterclockwise as viewed from along the +z axis?