Most Completed Course

Return the course with the most completions and the number of completions.

Table schema

Enrollments(id INT PRIMARY KEY, student VARCHAR(10), course VARCHAR(10), progress INT, completed INT)

Sample data

id | student | course | progress | completed
1 | Ann | SQL | 100 | 1
2 | Bob | SQL | 40 | 0
3 | Cy | SQL | 100 | 1
4 | Ann | Python | 60 | 0
5 | Dee | Python | 100 | 1
6 | Eli | Python | 10 | 0
7 | Fay | Python | 0 | 0