Database query - unusual query - sql

Question

I'm trying to transfer a query to LINQ
It's a bit complicated and I don't know if I'm doing the right thing
There is also a problem with SELECT to save it properly
SQL QUERY:
SELECT ISNULL(SUM(1),0) TotalSubmitted,
ISNULL(SUM(CASE WHEN Pic.PhotoFileName IS NULL THEN 0 ELSE 1 END),0) TotalAssigned
FROM tblFromPhone Ph
INNER JOIN tblOfficer O ON Ph.OfficerCode = O.Code
OUTER APPLY(SELECT PhotoFileName FROM tblPhotos P
WHERE P.validityTo IS NULL
AND P.PhotoFileName = Ph.DocName
AND P.OfficerID = O.OfficerID)Pic
WHERE CAST(Ph.LandedDate AS DATE) BETWEEN #FromDate AND #ToDate
AND O.ValidityTo IS NULL
AND DocType = N'E'
AND OfficerCode = #OfficerCode
My LINQ:
var res = (from FP in context.TblFromPhone
join O in context.TblOfficer on FP.OfficerCode equals O.Code
join P in context.TblPhotos on FP.DocName equals P.PhotoFileName into P
from Ph in P.Where(x => x.OfficerId == O.OfficerId).DefaultIfEmpty()
where Ph.ValidityTo == null
where FP.LandedDate >= DateTime.Parse(fromDate)
&& FP.LandedDate <= DateTime.Parse(toDate)
&& O.ValidityTo == null
&& FP.DocType == "E"
&& FP.OfficerCode == officerCode
select new EnrolmentModel()
{
TotalSubmitted = // How to make?
TotalAssigned = // How to make?
})
.FirstOrDefault();