InferenceAttack2

You may query the database to find some certain statistics such as min, max, average, etc. of various data, however queries must include at least four users in order to protect each user's privacy. In addition, if your queries exclude any users, they must exclude at least four employees in the aggregate function.
Your goal is to determine Alice's salary.
Note: A real database is used for this challenge, and it is rolled back after each attempt.

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Challenge by ynori7.