diff --git a/task01/src/com/example/task01/Task01Main.java b/task01/src/com/example/task01/Task01Main.java
index 5dfc11b..927bef2 100644
--- a/task01/src/com/example/task01/Task01Main.java
+++ b/task01/src/com/example/task01/Task01Main.java
@@ -1,7 +1,6 @@
 package com.example.task01;
 
-import java.io.File;
-import java.io.IOException;
+import java.io.*;
 
 public class Task01Main {
     public static void main(String[] args) throws IOException, InterruptedException {
@@ -14,7 +13,27 @@ public static void main(String[] args) throws IOException, InterruptedException
     }
 
     public static String extractSoundName(File file) throws IOException, InterruptedException {
-        // your implementation here
-        return "sound name";
+
+        String title = null;
+
+        ProcessBuilder processBuilder = new ProcessBuilder();
+        processBuilder.command("ffprobe", "-v", "error", "-of", "flat", "-show_format", file.getName());
+        processBuilder.directory(file.getParentFile());
+
+        Process process = processBuilder.start();
+
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()))) {
+            String line;
+            while ((line = reader.readLine()) != null) {
+                if (line.startsWith("format.tags.title")) {
+                    title = line.split("=")[1].replace("\"", "");
+                    break;
+                }
+            }
+        }
+
+        process.waitFor();
+
+        return title;
     }
 }
diff --git a/task02/src/com/example/task02/Task02Main.java b/task02/src/com/example/task02/Task02Main.java
index 750f7ba..8188da1 100644
--- a/task02/src/com/example/task02/Task02Main.java
+++ b/task02/src/com/example/task02/Task02Main.java
@@ -1,7 +1,9 @@
 package com.example.task02;
 
 import java.io.IOException;
-import java.nio.file.Path;
+import java.nio.file.*;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.util.ArrayList;
 import java.util.List;
 
 public class Task02Main {
@@ -16,8 +18,17 @@ public static void main(String[] args) throws IOException, InterruptedException
     }
 
     public static List<Path> listFiles(Path rootDir) throws IOException, InterruptedException {
-        // your implementation here
 
-        return null;
+        List<Path> result = new ArrayList<>();
+
+        Files.walkFileTree(rootDir, new SimpleFileVisitor<Path>() {
+            @Override
+            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
+                result.add(file);
+                return FileVisitResult.CONTINUE;
+            }
+        });
+
+        return result;
     }
 }
diff --git a/task03/src/com/example/task03/SampleData.java b/task03/src/com/example/task03/SampleData.java
index 0654af5..5b1778c 100644
--- a/task03/src/com/example/task03/SampleData.java
+++ b/task03/src/com/example/task03/SampleData.java
@@ -1,10 +1,11 @@
 package com.example.task03;
 
+import java.io.Serializable;
 import java.util.Date;
 import java.util.Objects;
 
-public class SampleData {
-    static final long serialVersionUID = 132706691457162967L;
+public class SampleData implements Serializable {
+    private static final long serialVersionUID = 132706691457162967L;
 
     String name;
     int value;
diff --git a/task03/src/com/example/task03/Task03Main.java b/task03/src/com/example/task03/Task03Main.java
index 740fff1..c56f2b8 100644
--- a/task03/src/com/example/task03/Task03Main.java
+++ b/task03/src/com/example/task03/Task03Main.java
@@ -2,6 +2,7 @@
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.ObjectInputStream;
 
 public class Task03Main {
     public static void main(String[] args) throws IOException, ClassNotFoundException {
@@ -15,7 +16,13 @@ public static void main(String[] args) throws IOException, ClassNotFoundExceptio
     }
 
     public static SampleData deserialize(InputStream inputStream) throws IOException, ClassNotFoundException {
-        // your implementation here
-        return null;
+
+        SampleData deserializedData;
+
+        try (ObjectInputStream objectInputStream = new ObjectInputStream(inputStream)) {
+            deserializedData = (SampleData) objectInputStream.readObject();
+        }
+
+        return deserializedData;
     }
 }