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Modelling is concerned with representing real life situations. Variables can be changed with a model to find out different outcomes. Modelling has a number of advantages: - * It is cheaper to set up a computer model than build the physical model. * The computer model can be changed modified quickly and easily to allow the user to view the effects of changing variables. * You can reset your test as often as you like. * Dangerous situations or conditions can be modelled safely. * Using a computer model speeds up the overall development process. Below are also some various disadvantages: - * A computer model may not completely reflect real life situations. * Answers and results are only as good as the model. * Humans are unpredictable in nature so the model may be considered unreliable. The spreadsheet package has been adopted for this modelling situation. This is a package which models and processes numerical data....

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