A dust particle has an excess charge of 4.0×10^6 electrons and a mass of 6.0×10^−8 g. It is initially held at d=1.0×10^−3 m directly above a fixed object of the same size that is charged with the same number of electrons. Both objects are in an evacuated container.

Determine the maximum height of the dust particle after its release measured from its initial position.
Express your answer with the appropriate units.

Determine the initial force exerted on the dust particle by the fixed charge.
Express your answer with the appropriate units.

Determine the forces exerted on the dust particle by the stationary charge.
Express your answer with the appropriate units.