diff --git a/task01/src/com/example/task01/Task01Main.java b/task01/src/com/example/task01/Task01Main.java
index 5dfc11b..9cc4741 100644
--- a/task01/src/com/example/task01/Task01Main.java
+++ b/task01/src/com/example/task01/Task01Main.java
@@ -1,20 +1,46 @@
 package com.example.task01;
 
+import java.io.BufferedReader;
 import java.io.File;
 import java.io.IOException;
+import java.io.InputStreamReader;
 
 public class Task01Main {
     public static void main(String[] args) throws IOException, InterruptedException {
-        //здесь вы можете вручную протестировать ваше решение, вызывая реализуемый метод и смотря результат
-        // например вот так:
-
-        /*
         System.out.println(extractSoundName(new File("task01/src/main/resources/3727.mp3")));
-        */
     }
 
-    public static String extractSoundName(File file) throws IOException, InterruptedException {
-        // your implementation here
-        return "sound name";
+    public static String extractSoundName(File file) throws IOException {
+        ProcessBuilder processBuilder = new ProcessBuilder(
+                "C:\\Users\\user\\Desktop\\ffmpeg\\ffmpeg-8.0.1-full_build\\bin\\ffprobe.exe",
+                "-v", "error",
+                "-of", "flat",
+                "-show_format",
+                file.getAbsolutePath()
+        );
+
+        try {
+            Process process = processBuilder.start();
+            StringBuilder output = new StringBuilder();
+
+            try (BufferedReader reader = new BufferedReader(
+                    new InputStreamReader(process.getInputStream()))) {
+                String line;
+                while ((line = reader.readLine()) != null) {
+                    output.append(line).append("\n");
+                    if (line.startsWith("format.tags.title=")) {
+                        String title = line.substring(line.indexOf('"') + 1, line.lastIndexOf('"'));
+
+                        process.waitFor();
+                        return title;
+                    }
+                }
+            }
+
+            return null;
+
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
     }
 }
diff --git a/task02/src/com/example/task02/Task02Main.java b/task02/src/com/example/task02/Task02Main.java
index 750f7ba..70a37a6 100644
--- a/task02/src/com/example/task02/Task02Main.java
+++ b/task02/src/com/example/task02/Task02Main.java
@@ -1,23 +1,35 @@
 package com.example.task02;
 
 import java.io.IOException;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.ArrayList;
 import java.util.List;
+import java.nio.file.Paths;
 
 public class Task02Main {
     public static void main(String[] args) throws IOException, InterruptedException {
-        //здесь вы можете вручную протестировать ваше решение, вызывая реализуемый метод и смотря результат
-        // например вот так:
-
-        /*
         System.out.println(listFiles(Paths.get("task02/src/main/resources/")));
-        */
-
     }
 
     public static List<Path> listFiles(Path rootDir) throws IOException, InterruptedException {
-        // your implementation here
+        List<Path> result = new ArrayList<>();
+
+        if (!Files.exists(rootDir) || !Files.isDirectory(rootDir)) {
+            return result;
+        }
+
+        try (DirectoryStream<Path> stream = Files.newDirectoryStream(rootDir)) {
+            for (Path entry : stream) {
+                if (Files.isDirectory(entry)) {
+                    result.addAll(listFiles(entry));
+                } else if (Files.isRegularFile(entry)) {
+                    result.add(entry);
+                }
+            }
+        }
 
-        return null;
+        return result;
     }
 }
diff --git a/task03/src/com/example/task03/SampleData.java b/task03/src/com/example/task03/SampleData.java
index 0654af5..61bc6b9 100644
--- a/task03/src/com/example/task03/SampleData.java
+++ b/task03/src/com/example/task03/SampleData.java
@@ -2,8 +2,9 @@
 
 import java.util.Date;
 import java.util.Objects;
+import java.io.Serializable;
 
-public class SampleData {
+public class SampleData implements Serializable{
     static final long serialVersionUID = 132706691457162967L;
 
     String name;
diff --git a/task03/src/com/example/task03/Task03Main.java b/task03/src/com/example/task03/Task03Main.java
index 740fff1..a814418 100644
--- a/task03/src/com/example/task03/Task03Main.java
+++ b/task03/src/com/example/task03/Task03Main.java
@@ -2,20 +2,17 @@
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.ObjectInputStream;
+import java.io.FileInputStream;
 
 public class Task03Main {
     public static void main(String[] args) throws IOException, ClassNotFoundException {
-        //здесь вы можете вручную протестировать ваше решение, вызывая реализуемый метод и смотря результат
-        // например вот так:
-
-        /*
         System.out.println(deserialize(new FileInputStream("task03/src/main/resources/example1.bin")));
-        */
-
     }
 
     public static SampleData deserialize(InputStream inputStream) throws IOException, ClassNotFoundException {
-        // your implementation here
-        return null;
+        try(ObjectInputStream ois = new ObjectInputStream(inputStream)){
+            return (SampleData) ois.readObject();
+        }
     }
 }