Managers with at Least 5 Direct Reports

Task: Find the names of managers with at least 5 direct reports.

Table: Employee

+-------------+--------------+
| Column Name | Type         |
+-------------+--------------+
| id          | INT          |
| name        | varchar(255) |
| department  | varchar(255) |
| managerId   | INT          |
+-------------+--------------+

Input: Employee table:

+-----+-------+------------+-----------+
| id  | name  | department | managerId |
+-----+-------+------------+-----------+
| 101 | John  | A          | null      |
| 102 | Dan   | A          | 101       |
| 103 | James | A          | 101       |
| 104 | Amy   | A          | 101       |
| 105 | Anne  | A          | 101       |
| 106 | Ron   | B          | 101       |
+-----+-------+------------+-----------+

Output:

+------+
| name |
+------+
| John |
+------+