An Electron Enters a Uniform Magnetic Field of 0 $\circ$ to the Magnetic Field Lines

An electron enters a uniform magnetic field of 0.0600 T at an angle of 61.4 ^$\circ$ to the magnetic field lines.The electron will travel in a helical path of radius 4.80 * 10^-5 m.Find the speed of the electron.

A) 6.13 * 10⁵ m/s
B) 6.00 * 10⁵ m/s
C) 5.06 * 10⁵ m/s
D) 5.76 * 10⁵ m/s