Gradebook API to fetch Scores/Grades

[NitinN]

I am exploring the APIs to fetch Total score for every Module in a Course for all the Students. Please refer the attached screen print. I was able to get the scores for each assignment/quizzes using /submissions API and the final score for the whole course through /enrollments but finding difficulty to get the module total/average score highlighted in the pic. 

Could anyone please advise on this?

GET /api/v1/courses/:course_id/assignments/:assignment_id/submissions