Need to create one linq query for database for creating result array at server side. (Methods: GetStudentAvgMarks, GetStudentHomeworkAvgMarks, GetStudentAvgVisitsPercentageAsync)
It happening like this
![image](https://user-images.githubusercontent.com/40039501/188073590-90ca2293-1aa0-49d8-953d-59be280994b4.png)
Need to be like this
![image](https://user-images.githubusercontent.com/40039501/188074243-027b80d3-8aba-4dc3-8b09-73e36e0aaf54.png)
but this not working, figure it out