diff --git a/yakovleva_yulia_lab_4/NewTask/NewTask.cs b/yakovleva_yulia_lab_4/NewTask/NewTask.cs
index 0fe09d7..31f4518 100644
--- a/yakovleva_yulia_lab_4/NewTask/NewTask.cs
+++ b/yakovleva_yulia_lab_4/NewTask/NewTask.cs
@@ -5,8 +5,8 @@ var factory = new ConnectionFactory { HostName = "localhost" };
 using var connection = factory.CreateConnection();
 using var channel = connection.CreateModel();
 
-channel.QueueDeclare(queue: "hello",
-                     durable: false,
+channel.QueueDeclare(queue: "task_queue",
+                     durable: true,
                      exclusive: false,
                      autoDelete: false,
                      arguments: null);
@@ -14,9 +14,12 @@ channel.QueueDeclare(queue: "hello",
 var message = GetMessage(args);
 var body = Encoding.UTF8.GetBytes(message);
 
+var properties = channel.CreateBasicProperties();
+properties.Persistent = true;
+
 channel.BasicPublish(exchange: string.Empty,
-                     routingKey: "hello",
-                     basicProperties: null,
+                     routingKey: "task_queue",
+                     basicProperties: properties,
                      body: body);
 Console.WriteLine($" [x] Sent {message}");
 
diff --git a/yakovleva_yulia_lab_4/Worker/Worker.cs b/yakovleva_yulia_lab_4/Worker/Worker.cs
index f67c1fe..e712fba 100644
--- a/yakovleva_yulia_lab_4/Worker/Worker.cs
+++ b/yakovleva_yulia_lab_4/Worker/Worker.cs
@@ -6,18 +6,20 @@ var factory = new ConnectionFactory { HostName = "localhost" };
 using var connection = factory.CreateConnection();
 using var channel = connection.CreateModel();
 
-channel.QueueDeclare(queue: "hello",
-                     durable: false,
+channel.QueueDeclare(queue: "task_queue",
+                     durable: true,
                      exclusive: false,
                      autoDelete: false,
                      arguments: null);
 
+channel.BasicQos(prefetchSize: 0, prefetchCount: 1, global: false);
+
 Console.WriteLine(" [*] Waiting for messages.");
 
 var consumer = new EventingBasicConsumer(channel);
 consumer.Received += (model, ea) =>
 {
-    var body = ea.Body.ToArray();
+    byte[] body = ea.Body.ToArray();
     var message = Encoding.UTF8.GetString(body);
     Console.WriteLine($" [x] Received {message}");
 
@@ -25,9 +27,12 @@ consumer.Received += (model, ea) =>
     Thread.Sleep(dots * 1000);
 
     Console.WriteLine(" [x] Done");
+
+    // here channel could also be accessed as ((EventingBasicConsumer)sender).Model
+    channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
 };
-channel.BasicConsume(queue: "hello",
-                     autoAck: true,
+channel.BasicConsume(queue: "task_queue",
+                     autoAck: false,
                      consumer: consumer);
 
 Console.WriteLine(" Press [enter] to exit.");