Function: Get the earning statements by calling this funcitons

Function: get all completed status of earning

Function: Get total students count by an instructor

Function: Get the rating of an instructor

Filter Hook: Filter the output of dozent_is_course_author();

Function: Determine if an instructor is a specific course author | Owner

Filter Hook: Filter the return of dozent_get_courses_by_instructor() function

Function: Get courses by instructors

Filter Hook: Filter the return of dozent_get_total_courses_by_instructor() function

Function: Return total course count by an instructor