Voltammograms:

The amount of separation among these potentials will depend on the category of the potential, technique used, concentration of the elements. If the difference is less than minimum separation and there is overlap among the voltammograms of the two components, independent analysis is not probable and a simultaneous analysis method is to be followed through taking the sample and simultaneous equations for the current at two potential be formed and through solving these equations, the concentrations of both the analytes can be acquired.

The analysis has been explained within detail in the numericals given in the terminal questions.