A Voltaic Cell Consists of a Mn/Mn²⁺ Electrode (E $\degree$ = -118 V) and a Fe/Fe²⁺ Electrode (E

A voltaic cell consists of a Mn/Mn²⁺ electrode (E $\degree$ = -1.18 V) and a Fe/Fe²⁺ electrode (E $\degree$ = -0.44 V) . Calculate [Fe²⁺] if [Mn²⁺] = 0.050 M and E_cell = 0.78 V at 25 $\degree$ C.

A) 0.040 M
B) 0.24 M
C) 1.1 M
D) 1.8 M
E) None of these choices is correct.