diff --git a/task01/src/com/example/task01/Task01Main.java b/task01/src/com/example/task01/Task01Main.java
index 5dfc11b..381ec9c 100644
--- a/task01/src/com/example/task01/Task01Main.java
+++ b/task01/src/com/example/task01/Task01Main.java
@@ -1,20 +1,45 @@
 package com.example.task01;
 
+import java.io.BufferedReader;
 import java.io.File;
 import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.Optional;
 
 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")));
-        */
+        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";
+
+        ProcessBuilder processBuilder = new ProcessBuilder(
+                "ffprobe", "-v",
+                "error", "-of",
+                "flat", "-show_format",
+                file.getAbsolutePath()
+        );
+
+        processBuilder.redirectOutput(ProcessBuilder.Redirect.PIPE);
+
+        Process process = processBuilder.start();
+
+        BufferedReader reader = new BufferedReader(
+                new InputStreamReader(process.getInputStream()));
+
+        String line;
+
+        while ((line = reader.readLine()) != null) {
+            if (line.contains("title")) {
+                return line.split("=")[1].replace("\"", "");
+            }
+        }
+
+        return null;
     }
 }
diff --git a/task02/src/com/example/task02/Task02Main.java b/task02/src/com/example/task02/Task02Main.java
index 750f7ba..186f25f 100644
--- a/task02/src/com/example/task02/Task02Main.java
+++ b/task02/src/com/example/task02/Task02Main.java
@@ -1,23 +1,27 @@
 package com.example.task02;
 
 import java.io.IOException;
+import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 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> pathStream = Files.walk(rootDir)
+                .filter(path -> Files.isRegularFile(path))
+                .collect(Collectors.toList());
 
-        return null;
+        return pathStream;
     }
 }
diff --git a/task03/src/com/example/task03/SampleData.java b/task03/src/com/example/task03/SampleData.java
index 0654af5..70bbc0b 100644
--- a/task03/src/com/example/task03/SampleData.java
+++ b/task03/src/com/example/task03/SampleData.java
@@ -1,9 +1,10 @@
 package com.example.task03;
 
+import java.io.Serializable;
 import java.util.Date;
 import java.util.Objects;
 
-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..abb4a98 100644
--- a/task03/src/com/example/task03/Task03Main.java
+++ b/task03/src/com/example/task03/Task03Main.java
@@ -1,21 +1,25 @@
 package com.example.task03;
 
+import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.ObjectInputStream;
+import java.nio.file.Files;
 
 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")));
-        */
-
+        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;
+        SampleData deserializedSampleData;
+        ObjectInputStream ois = new ObjectInputStream(inputStream);
+        deserializedSampleData = (SampleData) ois.readObject();
+        return deserializedSampleData;
     }
 }