Calculate and plot the levelized cost of energy (LCOE) as a function of the debt rate for 4% less tha no requal to i_debt less than o requal to 12% for a large utility-scale PV plant in Abu Dhabi. The size of the plant is 400MW, the debt to equity ratio is 80:20. Equity returns are set at 10%. In AD the plant achieves 1700FLH on average per year. The overnight cost of constructing the plant is 0.5US$/Wpeak installed. Opex costs are 1% of the Capex. How much should the overnight costs drop to counteract an increase of debt from 4% to 8% in order to keep the LCOE equal to what it was at 4% financing?