I have one project requires me to compare two raw material for economic analysis utilizing PW, EUAW, payback period, Benefit/Cost Ratio and Rate of return. The second part of the project focuses on the evaluation of the future consequences of the alternatives considering the uncertainty in the future as a result of Covid-19. The evaluation should consider the potential of Covid-19 impacts on the costs and benefits of the alternatives under study. Three scenarios should be investigated: (1) optimistic estimate, (2) most likely estimate and (3) pessimistic estimate, depending on how long economic recovery could take and the urgent demand of the consumer goods. How should i relate them? together? Pls help