public function adminStats()
 {
     $submissions = Submission::all();
     $labs = Submission::where('name', 'like', 'Lab%')->get();
     $assignments = Submission::where('name', 'like', 'Assignment%')->get();
     $inClasses = Submission::where('name', 'like', 'in-class%')->get();
     $midterms = Submission::where('name', 'like', 'Midterm%')->get();
     $surveys = Submission::where('name', 'like', 'Survey%')->get();
     return view('stats.admin', ['submissions' => $submissions, 'labs' => $labs, 'assignments' => $assignments, 'inClasses' => $inClasses, 'midterms' => $midterms, 'surveys' => $surveys]);
 }
 /**
  * Run the database seeds.
  *
  * @return void
  */
 public function run()
 {
     $users = User::where('admin', false)->get();
     $submissions = Submission::all();
     foreach ($users as $user) {
         foreach ($submissions as $submission) {
             $user->grades()->create(['user_id' => $user->id, 'submission_id' => $submission->id, 'mark' => rand(0, $submission->total)]);
         }
     }
 }