b] Critically evaluate whether you should use options or futures to hedge against the risks that OZPRTS Co. faces from its purchase of aluminium. You should: i) use appropriate diagrams to indicate both OZPRTS Co's exposure to; and the impact of, each of these derivativebased hedges on the cost of aluminium and the relevant exchange rate ii] identify and explain any problems that might be present in the implementation of each of these derivativebased hedging strategies (e. g. accuracy, cost}, both individually and in combination with each other iii) choose one of these derivativebased hedge instruments for each of the exposures that OZPRTS Co. faces on its input side and justify your choice