Given the table marks containing the details of marks obtained by students containing the following columns Student_id : Storing the id of the student Course : Storing the name of the course Marks : Storing the marks obtained by the student in the particular course and the table teacher containing the details of the teacher with the following columns Teacher_name : Storing the name of the teacher Course : Storing the course taught by the teacher Write a query to find the name of the teacher teaching the course with the highest average.