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Task 20:

Analyze weekly rentals

Find the average number of disks rented by each customer in August 2005, broken down by week. 
Present the result in two columns: week_num - week number, weekly_average_rental_count - the average number of discs rented by one user. Sort the results by week number.

Use MySQL syntax to write your answer. Descriptions of tables are provided in the right pane.

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