Three point charges are placed on the x$-$axis. A charge of $+2\mathrm{.}0$ C is placed at the origin, $2\mathrm{.}0$ C to the right at x$=50$ cm$,$ and $+4\mathrm{.}0$ C at the $100$ cm mark. What is the magnitude of the electrostatic force that acts on the charge at the origin? $($k$=1/4$$0=8\mathrm{.}9910^9$ N $$ m$2/$C$2)$

What is the direction of the electrostatic force that acts on the charge at the origin?