The Standard Potential of the Cu²⁺/Cu Electrode Is +0

Multiple Choice

The standard potential of the Cu²⁺/Cu electrode is +0.34 V and the standard potential of the cell
Pb(s) |Pb²⁺(aq) M Cu²⁺(aq) |Cu(s)
Is +0.47 V.What is the standard potential of the Pb²⁺/Pb electrode?

A) -0.26 V
B) +0.81 V
C) -0.81V
D) -0.13 V
E) +0.13 V