One Member of a Pair of Parallel Conducting Plates Has

One member of a pair of parallel conducting plates has potential 17 V. An electron is ejected from that plate and travels the other plate, attaining a velocity of 5.0 × 10⁶ m/s in the process. What is the potential of the second plate? The mass of the electron is 9.11 × 10⁻³¹ kg.

A) 157 V
B) 88 V
C) 72 V
D) −54 V
E) 142 V