two $10-$cm $-$diameter charged disks face each other, $30$ cm apart. The left disk is charged to $-50$ nC and the right disk is charged to $+50$ nC $.$What is the electric field's E$$ magnitude at the midpoint between the two disks?What is the electric field's direction at the midpoint between the two disks?What is the magnitude of force F$$ on a $-2\mathrm{.}7$ nC charge placed at the midpoint?What is the direction of force F$$ on a $-2\mathrm{.}7$ nC charge placed at the midpoint?