Photovoltaic question.

Plot the IV profile of a generic photovoltaic cell with an ideality factor of unity, Ix = 9.4 A and Voc = 0.653 V. Show that at P = P_max, dl/dV = I/V. On same graph that you plotted I vs V, plot dI/dV. Describe how this could be used for a maximum power point tracker. Plot the IV profile of a generic photovoltaic cell with an ideality factor of unity, Ix = 9.4 A and Voc = 0.653 V. Show that at P = P_max, dl/dV = I/V. On same graph that you plotted I vs V, plot dI/dV. Describe how this could be used for a maximum power point tracker