Three point$-$like charges are placed at the corners of an equilateral triangle as shown in the figure. Each side of the triangle has a length of $34\mathrm{.}0$ cm$,$ and the point $($A$)$ is located half way between q$1$ and q$2$ along the side. Find the

magnitude of the electric field at point $($A$).$ Let q$1=-3\mathrm{.}10$ uC$,$ q$2=-2\mathrm{.}40$ uC$,$ and q$3=4\mathrm{.}20$ uC$.$ answer in N$/$C