Three charged particles are located at the corners of an equilateral triangle as shown in the figure below $($let q $=1\mathrm{.}00$C$,$ and L $=0\mathrm{.}850$ m$).$ Calculate the total electric force on the $7\mathrm{.}00-$C charge.

magnitude N

direction $\backslash$deg $($counterclockwise from the $+$x axis$)$

Three charged particles lie in the x y coordinate plane at the vertices of an equilateral triangle with side length L$.$

Positive charge q is at the origin.

A charge of $7\mathrm{.}00$C is in the first quadrant, along a line $60\mathrm{.}0\backslash$deg counterclockwise from the positive x$-$axis.

A charge of $4\mathrm{.}00$C is at $($L$,0).$