Маршрут [student.update] не определен. используя ларавель 7

я новичок в ларавеле. Я столкнулся с проблемой, когда Route [student.update] не определен. используя laravel 7. при запуске проекта laravel. то, что я пробовал до сих пор, я прикрепил ниже. я прикрепил контроллер и файл просмотра и маршрута ниже, я не знаю, в чем была проблема.

Контроллер

public function edit(Student $student)
{ 
    return view('edit')->with('student',$student);
}


public function update(Request $request, Student $student)
{
    Student::update([
        'name' => $request->name,
        'phone' => $request->phone,
        'address' => $request->address,
        'created_at' => now(),
    ]);
    return redirect()->route('student.index')->with('success', 'Student has been Updatedddd');
}

edit.blade.php

<form action = "{{ route('student.update',$student->id) }}" method = "POST">
    @csrf
  
     <div class = "row">
        
        <div class = "col-xs-12 col-sm-12 col-md-12">
            <div class = "form-group">
                <strong>Name:</strong>
                <input type = "text" name = "name" value = "{{ $student->name  }}" class = "form-control" placeholder = "Name">
            </div>
        </div>

        <div class = "col-xs-12 col-sm-12 col-md-12">
            <div class = "form-group">
                <strong>Phone:</strong>
                <input class = "form-control"  name = "phone" value = "{{ $student->phone  }}"  placeholder = "Phone"></textarea>
            </div>
        </div>

        <div class = "col-xs-12 col-sm-12 col-md-12">
            <div class = "form-group">
                <strong>Address:</strong>
                <input class = "form-control"  name = "address" value = "{{ $student->address  }}"  placeholder = "Address"></textarea>
            </div>
        </div>
        <div class = "col-xs-12 col-sm-12 col-md-12 text-center">
                <button type = "submit" class = "btn btn-primary">Submit</button>
        </div>
    </div>
   
</form>

index.blade.php

@extends('layout')
 
@section('content')
    <div class = "row">
        <div class = "col-lg-12 margin-tb">
            <div class = "pull-left">
                <h2>Laravel 7 CRUD Example from scratch - ItSolutionStuff.com</h2>
            </div>
            <div class = "pull-right">
            <a class = "btn btn-success" href = "{{ route('student.create')}}"> Create New Student</a>
            </div>
        </div>
    </div>
   
    @if ($message = Session::get('success'))
        <div class = "alert alert-success">
            <p>{{ $message }}</p>
        </div>
    @endif
  
    <table class = "table table-bordered">
        <tr>
            <th>No</th>
            <th>Name</th>
            <th>Phone</th>
            <th>Address</th>
            <th width = "280px">Action</th>

        </tr>
  
        @foreach ($students as $student)
        <tr>
            <td>{{ $student->id  }}</td>
            <td>{{ $student->name }}</td>
            <td>{{ $student->phone }}</td>
            <td>{{ $student->address }}</td>
            <td>
                <a class = "btn btn-primary" href = "{{ route('student.edit',$student->id) }}">Edit</a>
                <button type = "submit" class = "btn btn-danger">Delete</button>
            </td>
        </tr>
        @endforeach
    </table>
    {!! $students->links() !!}      
@endsection

Маршруты

Route::get('/students/{student}', 'StudentController@edit')->name('student.edit');
Route::get('/students/{student}', 'StudentController@update')->name('student.update');