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…showed last 75 words of 513 total…for the business. It must give 100% satisfaction to the user and the customer. Three scenarios that can be applied to this situation are: to have well knowing people using the system and prepared well enough to provide fast and effective service. The designers must provide a GUI that is easy for people to become good at in a matter of just minutes. Lastly, the efficiency of the GUI should be determined by how ------------------------------------------------------------------------ **Bibliography**