A proton by initial velocity components v(x) = 1.30 x 10^6 m/s, v(y) = 0, v(z) = 2.10 x10^4 m/s is placed in a constant and uniform magnetic field in the positive z-direction by magnitude 0.600 T. The proton subsequently travels in a helical trajectory. Discover the initial magnetic force on the proton, its initial acceleration due to magnetism, the radius of the helix and the z-component of the proton's displacement through one revolution.