An electron moves in a circular path perpendicular to a

Question

Solve the all parts of given problem:

Problem: An electron moves in a circular path perpendicular to a constant magnetic field with a magnitude of 2.00 mT. The angular momentum of the electron about the center of the circle is 3.00 x 10^-25 J•s.

Part A: Determine the radius of the circular path?

Part B: Determine the speed of the electron?

Show all work, use additional paper if necessary for above problem.