Join 3 tables and select 1 coloum using linq

I have three tables Student, TimeSheet and TimeRecord.

*Talbe columns:**

• Student : StudentId, FirstName, LastName

• TimeSheet: TimeSheetId,StudentId, IsActive

• TimeRecord: TimeRecordId,TimeSheetId, AddId

Table relationship:

• Student 1:N TimeSheet (FK StudentId)
• TimeSheet 1:N TimeRecord (FK TimeSheetId)

Student sample data:

StudentId, FirstName, LastName

• 10 , Macro , John
• 11 , Hiro , Edge
• 12 , Sarah , Lemon

TimeSheet sample data:

TimeSheetId, StudentId, IsActive

• 187 , 10 , True
• 196 , 11 , True
• 195 , 12 , True
• 199, 10 , False
• 200 , 12 , False

TimeRecord sample data:

TimeRecordId, TimeSheetId, Addid

• 1 , 187 , 1

• 2 , 196 , 2

• 3 , 187 , 3

• 4 , 187 , 4

• 5 , 196 , 5

• 6 , 196 , 6

• 7 , 195 , 7

• 8 , 199, 8

How to write linq Query to get count of the aadid for the student with id=10.