Electron Velocity in Electric Field

An electron is made to enters symmetrically between two parallel and equally but oppositely charged metal plates, each of 10 cm length. The electron emerges out of the field region with a horizontal component of velocity 10⁶ m/s. If the magnitude of the electric between the plates is 9.1 V/cm, then the vertical component of velocity of electron is : (mass of electron = 9.1 × 10^–31 kg and charge of electron = 1.6 × 10^–19 C)