Hearing Aid Batteries Utilize a Zinc/air Electrochemical Cell $~~~~~~~~$ -1249 V $~~~~~~~~$

Hearing aid batteries utilize a zinc/air electrochemical cell. The reduction half-reactions and standard reduction potentials for this cell are given below. Write the balanced reaction equation for the cell and report the sum of the stoichiometric coefficients.
$~~~~~~~~$ -1.249 V $~~~~~~~~$ +0.401 V

A) 4
B) 5
C) 6
D) 7
E) 8