Two point charges are placed on the $x-$axis as follows: charge q ${}_1=4\mathrm{.}0\mathrm{5 }$nC is located at $x=0\mathrm{.}200m,$ and charge q ${}_2=5\mathrm{.}01$nC is at $x=-0\mathrm{.}296m.$

What is the magnitude of the total force exerted by these two charges on a negative point charge q ${}_3=-5\mathrm{.}95$nC that is placed at the origin?

Express your answer in newtons.