Radius and pitch of a helix

A proton, of mass $m_p=1.67\cdot 10^{-27}\mathrm{kg}$, enters a uniform magnetic field $B=0.050\mathrm{T}$ with velocity $v=3.0\cdot 10^{5}m/s$ forming an angle of $60^{\circ }$ with the field. Compute the radius and the pitch of the helix.