Help Me! Convert SQL Syntax To LINQ With Multi Join

Hi...

I have 3 tables:
SportTeams (TeamID, TeamName)
SportAthletes (TeamID, AthleteID, AthleteName)
SportMedals (AthleteID, Medal)

I want to have a brief medal list (TeamID, G, S, B). I can write query in systax:

Select a.TeamID, a.TeamName_en,g.G,s.S,b.B from SportTeams a
Left Join
(Select c.TeamID,Count(*) as G from SportMedals b
Inner Join SportAthletes c On b.AthleteID = c.AthleteID
Where Medal = 'G'
Group By c.TeamID) g On a.TeamID = g.TeamID
Left Join
(Select c.TeamID,Count(*) as S from SportMedals b
Inner Join SportAthletes c On b.AthleteID = c.AthleteID
Where Medal = 'S'
Group By c.TeamID) s On a.TeamID = s.TeamID
Left Join
(Select c.TeamID,Count(*) as B from SportMedals d
Inner Join SportAthletes c On d.AthleteID = c.AthleteID
Where Medal = 'B'
Group By c.TeamID) b On a.TeamID = b.TeamID
Order By g.G desc, s.S desc, b.B desc, a.TeamID asc

But I can't write it in LINQ syntax (I am beginner with C#, LINQ)

Can you help this sample to LINQ systax?

Thanks!