A Pair of Parallel Conducting Plates Have Potentials of -17 $\times$

A pair of parallel conducting plates have potentials of -17 V and 55 V,respectively.An electron is ejected from the plate at potential -17 V and travels to the plate at 55 V.What is the speed of the electron as it strikes the 55 V plate,assuming it left the -17 V plate from rest? The mass of the electron is 9.11 $\times$ 10^-31 kg.

A) 2.2 $\times$ 10⁶ m/s.
B) 5.0 $\times$ 10⁶ m/s
C) 3.6 $\times$ 10⁶ m/s
D) 3.1 $\times$ 10⁶ m/s