In a small company, there are 5 teams with different numbers of employees. The number of employees in each team is as follows: 8, 12, 15, 10, and 5. If the company wants to increase the average number of employees per team to 13 by adding the same number of new employees to each team, how many new employees should be added to each team? Let's think step by step and output the final answer within \boxed{}.
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