Consider two positive point charges, $q_1=q_2=2nC,$ and one negative point charge $q_3=-2nC,$

positioned in the $xy-$plane as follows:

$x_1=0$hat$(i)+0$hat$(j),x_2=3$mhat$(i)+0$hat$(j),x_3=0$hat$(i)+4$mhat$(j).$

Each charge $q_i$ experiences a Coulomb force $F_i$ due to the presence of the other two charges.

Determine the angle ${}_i($in degrees$)$ from the $x-$axis of each force $F_i.$