Import the `students.json` file into your local Mongo instance with this command:

    mongoimport --drop -d school -c students students.json

This dataset holds the same type of data as seen before, but it's modeled
differently. You might want to start by inspecting it in the Mongo shell.

Write a program in the language of your choice that will remove the
lowest homework score for each student. Since there is a single document
for each student containing an array of scores, you will need to update
the scores array and remove the homework.

Remember, just remove a homework score. Don't remove a quiz or an exam!

Hint/spoiler: With the new schema, this problem is a lot harder and
that is sort of the point. One way is to find the lowest homework in
code and then update the scores array with the low homework pruned.

To confirm you are on the right track, here are some queries to run
after you process the data with the correct answer shown:

Let us count the number of students we have:

    use school
    db.students.count()

The answer will be 200.

Let's see what Tamika Schildgen's record looks like once you have removed
the lowest score:

    db.students.find( { _id : 137 } ).pretty( )

This should be the output:

    {
        "_id" : 137,
        "name" : "Tamika Schildgen",
        "scores" : [
            {
                "type" : "exam",
                "score" : 4.433956226109692
            },
            {
                "type" : "quiz",
                "score" : 65.50313785402548
            },
            {
                "type" : "homework",
                "score" : 89.5950384993947
            }
        ]
    }

To verify that you have completed this task correctly, provide the
identity (in the form of their _id) of the student with the highest
average in the class with the following query that uses the aggregation
framework. The answer will appear in the _id field of the resulting
document.

    db.students.aggregate( [
    { '$unwind': '$scores' },
    {
        '$group':
        {
        '_id': '$_id',
        'average': { $avg: '$scores.score' }
        }
    },
    { '$sort': { 'average' : -1 } },
    { '$limit': 1 } ] )


The answer should be 13.