diff --git a/task01/src/com/example/task01/Task01Main.java b/task01/src/com/example/task01/Task01Main.java
index 5dfc11b0..1f95133c 100644
--- a/task01/src/com/example/task01/Task01Main.java
+++ b/task01/src/com/example/task01/Task01Main.java
@@ -1,7 +1,9 @@
 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 {
@@ -13,8 +15,20 @@ public static void main(String[] args) throws IOException, InterruptedException
         */
     }
 
-    public static String extractSoundName(File file) throws IOException, InterruptedException {
-        // your implementation here
-        return "sound name";
+
+    public static String extractSoundName(File file) throws IOException {
+        ProcessBuilder builder = new ProcessBuilder("cmd.exe", "/c", "ffprobe -v error -of flat -show_format ", file.getAbsolutePath());
+        builder.directory(new File("C:\\ffmpeg\\bin"));
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(builder.start().getInputStream()))) {
+            String line;
+            while ((line = reader.readLine()) != null) {
+                if (line.contains("title")) {
+                    if (line.contains("title")) {
+                        return line.split("\"")[1];
+                    }
+                }
+            }
+            return null;
+        }
     }
 }
diff --git a/task02/src/com/example/task02/Task02Main.java b/task02/src/com/example/task02/Task02Main.java
index 750f7bab..5b5df8b6 100644
--- a/task02/src/com/example/task02/Task02Main.java
+++ b/task02/src/com/example/task02/Task02Main.java
@@ -1,8 +1,10 @@
 package com.example.task02;
 
 import java.io.IOException;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.List;
+import java.util.stream.Collectors;
 
 public class Task02Main {
     public static void main(String[] args) throws IOException, InterruptedException {
@@ -15,9 +17,10 @@ public static void main(String[] args) throws IOException, InterruptedException
 
     }
 
-    public static List<Path> listFiles(Path rootDir) throws IOException, InterruptedException {
+    public static List<Path> listFiles(Path rootDir) throws IOException {
         // your implementation here
 
-        return null;
+        return Files.walk(rootDir).filter(path -> path.toFile().isFile()).collect(Collectors.toList());
     }
+
 }
diff --git a/task03/src/com/example/task03/SampleData.java b/task03/src/com/example/task03/SampleData.java
index 0654af50..c00f3691 100644
--- a/task03/src/com/example/task03/SampleData.java
+++ b/task03/src/com/example/task03/SampleData.java
@@ -2,9 +2,10 @@
 
 import java.util.Date;
 import java.util.Objects;
+import java.io.Serializable;
 
-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 740fff14..c2d6f61c 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 {
@@ -16,6 +17,8 @@ public static void main(String[] args) throws IOException, ClassNotFoundExceptio
 
     public static SampleData deserialize(InputStream inputStream) throws IOException, ClassNotFoundException {
         // your implementation here
-        return null;
+        try (ObjectInputStream obj = new ObjectInputStream(inputStream)) {
+            return (SampleData) obj.readObject();
+        }
     }
 }