It is the start of the week and Marie, Willy and Silvie have three jobs to complete. The three of them can work on these jobs in any order. Job A requires four hours of Marie’s time, five hours of Willy’s time and three hours of Silvie’s time. Job B requires two hours of Marie’s time, eight hours of Willy’s time and seven hours of Silvie’s time. Job C requires ten hours of Marie’s time, four hours of Willy’s time and five hours of Silvie’s time. Devise a schedule for Marie, Willy and Sylvie that details when they will be working on each job. (Assume that they work seven hours per day.)

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