Build an interesting and functional model in Excel Simulating a Case, future cash-flows related to an investment in a business of infrastructure of some sort. Specify at least three, at most five, relevant and non-trivial decision questions about this case. use ALL of the studied techniques (sensitivity, solver/optimizations, Monte Carlo simulation) to investigate and answer this question. Motivate the choice of technique. Make Sure questions require to make use Of ALL Of the studied techniques: sensitivity analysis, optimization and Monte carto simulation, as well as decision criterions