Oxygen generation and reduction (O2 + 4H+ + 4e = 2H2O) involves four electrons. Tafel slopes of the oxidation reaction a

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Oxygen generation and reduction (O2 + 4H+ + 4e = 2H2O) involves
four electrons. Tafel slopes of the oxidation reaction and the
reduction reaction were (38 mV) and -(118 mV), respectively).
(a) Which of the four one-electron reduction reactions is the
rate determination step?
(b) Suppose that α = 0.5, find the value ν. Explain the meaning
of the ν value obtained in this way.