Current Attempt in Progress

In the figure, a particle moves along a circle in a region of uniform magnetic field of magnitude $B=3\mathrm{.}2mT.$ The particle is either a proton or an electron $($you must decide which$).$ It experiences a magnetic force of magnitude $3\mathrm{.}1{10}^{-15}N.$ What are $($a$)$ the particle's speed, $($b$)$ the radius of the circle, and $($c$)$ the period of the motion?

$($a$)$ Number $$ Units $$

$($b$)$ Number $$ Units $$

$($c$)$ Number $$ Units $$