Correction exercice 2

db.restaurants .find( { "grades.grade": "A", "grades.score": { $gte: 20 }, }, { _id: 0, name : 1, } ) .sort({ name: -1 }); db.restaurants .find( { "grades.grade": "A", "grades.score": { $gte: 20 }, }, { _id: 0, name : 1, } ).count();