[QUE/EM-01010] EM-PROBLEM Alpha particle in magnetic field; motion in a circle

An alpha particle travels in a circular path of radius $0.45$m in a
magnetic field with $B=1.2$w/m$^2$.
Calculate 
(i) its speed (ii) its period of revolution, and (iii) its kinetic energy.

Mass of alpha particle = \(6.64424. 10^{-27}\)kg \(\approx  4\times M_p; 
M_p= 4\times938.27\) MeV.