Can `E_("cell")^(@)` or `Delta_(r)G^(@)` for cell reaction ever be equal to zero?

Can E_("cell")^(@) or DeltaG^(@) for cell reaction ever be equal to zero?

E_(cell)^(@) and Delta G^(@) are related as :

True or false: Both E_(cell)^@ and DeltaG^@ for the cell reaction are intensive properties.

For the cell, Zn|ZnO_(4)||AgNO_(3)|Ag , the cell reaction is : Zn+2Ag^(+)rarr Zn^(2+)+2Ag. If E_("cell")^(@)=+0.36V , then calculate Delta^(@) for the cell reaction of that cell.