A negative point charge $($q$)$ is at

the center of a circle with a

radius of $r=4\mathrm{.}72m$ as shown in

the figure. Given $|q|=300nC$;

and $=28\mathrm{.}0.$ What is the $x-$

component $($unit in $\frac{N}{C})$ of the

electric field at position $P?$