A particle of charge 25 microc and mass 16 x 10-15 kg

Question

Solve the all parts of given problem:

Problem: A particle of charge 25 µC and mass 1.6 x 10^-15 kg moves at a speed of 2135 m/s, and its velocity vector lies in the x-y plane. There is a magnetic field of magnitude 0.87 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.

Part A: Find the radius of this circle.

m

Part B: Find the period of the motion.

s

Please Help and show steps. I am trying to understand how to work this problem. Thanks in advance!