Final answer:
The business manager is responsible for giving instructions to the staff and setting up work schedules in a fast-food restaurant.
Step-by-step explanation:
In a fast-food restaurant, the person responsible for giving instructions to the staff and setting up weekly work schedules is typically the business manager.
The business manager oversees the operation of the restaurant and ensures that all tasks are carried out efficiently. They may also handle payroll, paychecks, bills, and other administrative responsibilities.
For example, the business manager might instruct the staff on how to handle customer complaints, manage inventory, and maintain cleanliness and hygiene standards.