My solution

app/Http/Controllers/CompanyController.php

@@ -20,7 +20,7 @@ public function store(Request $request)
     public function show(Company $company)
     {
         // TASK: retrieve the full URL to the uploaded photo file, using Spatie Media Library
-        $photo = '???';
+        $photo = $company->getFirstMediaUrl('companies');
 
         return view('companies.show', compact('company', 'photo'));
     }

app/Http/Controllers/HouseController.php

@@ -26,6 +26,10 @@ public function update(Request $request, House $house)
 
         // TASK: Delete the old file from the storage
 
+        if ($house->photo) {
+            Storage::delete($house->photo);
+        }
+
         $house->update([
             'name' => $request->name,
             'photo' => $filename,
@@ -38,5 +42,6 @@ public function download(House $house)
     {
         // TASK: Return the $house->photo file from "storage/app/houses" folder
         // for download in browser
+        return Storage::download($house->photo);
     }
 }

app/Http/Controllers/OfficeController.php

@@ -13,6 +13,7 @@ public function store(Request $request)
 
         // TASK: Upload the file "photo" so it would be written as
         //   storage/app/public/offices/[original_filename]
+        $request->file('photo')->storeAs('public/offices', $filename);
 
         Office::create([
             'name' => $request->name,

app/Http/Controllers/ProjectController.php

@@ -11,11 +11,12 @@ public function store(Request $request)
     {
         $request->validate([
             // TASK: Write the validation rule so "logo" file would be MAX 1 megabyte
+            'logo' => 'file|max:1024',
         ]);
 
         // TASK: change the below line so that $filename would contain only filename
         // The same filename as the original uploaded file
-        $filename = '???';
+        $filename = $request->file('logo')->getClientOriginalName();
         $request->file('logo')->storeAs('logos', $filename);
 
         Project::create([

app/Http/Controllers/ShopController.php

@@ -4,13 +4,22 @@
 
 use Illuminate\Http\Request;
 use Intervention\Image\Facades\Image;
+use Illuminate\Support\Facades\Storage;
+
 
 class ShopController extends Controller
 {
     public function store(Request $request)
     {
         $filename = $request->file('photo')->getClientOriginalName();
-        $request->file('photo')->storeAs('shops', $filename);
+        $path = $request->file('photo')->storeAs('shops', $filename);
+
+        // resizing the image
+        $image = Image::make(Storage::path($path))->resize(500, 500);
+
+        // save the resized image as "resized-$filename"
+        $resizedFilename = 'resized-' . $filename;
+        $image->save(Storage::path('shops/' . $resizedFilename));
 
         // TASK: resize the uploaded image from /storage/app/shops/$filename
         //   to size of 500x500 and store it as /storage/app/shops/resized-$filename