Electromagnetic radiation from a $7\mathrm{.}00$ mW laser is concentrated on a $4\mathrm{.}00$ mm$2$ area.

$($a$)$

What is the intensity in W$/$m$2?$

Suppose a $5\mathrm{.}00$ nC electric charge is in the beam. What is the maximum electric force $($in N$)$ it experiences? $($Enter the magnitude.$)$ If the electric charge moves at $300$ m$/$s$,$ what maximum magnetic force $($in N$)$ can it feel? $($Enter the magnitude.$)$