Question: 1 . Write / run the SQL statement that would display the average salary of the employees grouped by the column: department _ id (

1. Write/run the SQL statement that would display the average salary of the employees grouped by the column: department_id (that is the department which they work...so we are finding the average salary by department.
The output should display the departments ids and the average salaries for each department.
2. Write/run the SQL statement that would display the average salary of the employees grouped by the manager they report to (the manager_id).The output should display the manager_ids and the average salaries for each manager id.

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