Minnie and Nancy were at work in the summer planting pine seedlings. Each of them received a salary of 7 QAR / h. Minnie stayed at a local farm and had to pay 6 QAR a day for accommodation and food. Nancy lived close to work, so she always went home to eat. Draw the girls' payroll functions for one working day on the same graph, taking into account overnight and food expenses.

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Solution