A room with $3\mathrm{.}1-$m$-$high ceilings has a metal plate on the floor with V $=0$V and a separate metal plate on the ceiling. A $1\mathrm{.}1$ g glass ball charged to $4\mathrm{.}7$ nC is shot straight up at $5\mathrm{.}0$ m$/$s$.$ How high does the ball go if the ceiling voltage is $3\mathrm{.}210^6$ V $?$ How high does the ball go if the ceiling voltage is $3\mathrm{.}010^6$ V $?$