diff --git a/rogashova_ekaterina_lab_4/Consumer1.py b/rogashova_ekaterina_lab_4/Consumer1.py
new file mode 100644
index 0000000..eec878c
--- /dev/null
+++ b/rogashova_ekaterina_lab_4/Consumer1.py
@@ -0,0 +1,20 @@
+import pika
+import json
+import time
+
+connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
+channel = connection.channel()
+
+channel.queue_declare(queue='order_processing_queue')
+
+channel.queue_bind(exchange='online_store_events', queue='order_processing_queue')
+
+def callback(ch, method, properties, body):
+  message = json.loads(body.decode('utf-8'))
+  print(f"Received message in order_processing_queue: {message}")
+  time.sleep(2)
+
+channel.basic_consume(queue='order_processing_queue', on_message_callback=callback, auto_ack=True)
+
+print(' [*] Waiting for messages. To exit press CTRL+C')
+channel.start_consuming()
\ No newline at end of file
diff --git a/rogashova_ekaterina_lab_4/Consumer2.py b/rogashova_ekaterina_lab_4/Consumer2.py
new file mode 100644
index 0000000..66b7751
--- /dev/null
+++ b/rogashova_ekaterina_lab_4/Consumer2.py
@@ -0,0 +1,20 @@
+import pika
+import json
+import time
+
+connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
+channel = connection.channel()
+
+channel.queue_declare(queue='product_recommendation_queue')
+
+channel.queue_bind(exchange='online_store_events', queue='product_recommendation_queue')
+
+def callback(ch, method, properties, body):
+  message = json.loads(body)
+  print(f"Received message in product_recommendation_queue: {message}")
+  print(f"Обработка рекомендации: {message}")
+
+channel.basic_consume(queue='product_recommendation_queue', on_message_callback=callback, auto_ack=True)
+
+print(' [*] Waiting for messages. To exit press CTRL+C')
+channel.start_consuming()
\ No newline at end of file
diff --git a/rogashova_ekaterina_lab_4/Publisher.py b/rogashova_ekaterina_lab_4/Publisher.py
new file mode 100644
index 0000000..ecf390e
--- /dev/null
+++ b/rogashova_ekaterina_lab_4/Publisher.py
@@ -0,0 +1,25 @@
+import pika
+import json
+import time
+import random
+
+def generate_event():
+  events = [
+    {"event": "order_placed", "order_id": random.randint(100, 999), "product_name": random.choice(["iPhone 14 Pro", "Samsung Galaxy S23 Ultra", "MacBook Pro"]), "customer_id": random.randint(1000, 9999)},
+    {"event": "product_viewed", "product_id": random.randint(1000, 9999), "product_name": random.choice(["iPhone 14 Pro", "Samsung Galaxy S23 Ultra", "MacBook Pro"])},
+    {"event": "user_registered", "user_id": random.randint(10000, 99999), "username": f"user_{random.randint(1, 100)}"}
+  ]
+  return json.dumps(random.choice(events))
+
+connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
+channel = connection.channel()
+
+channel.exchange_declare(exchange='online_store_events', exchange_type='fanout')
+
+while True:
+  message = generate_event()
+  channel.basic_publish(exchange='online_store_events', routing_key='', body=message)
+  print(f"Sent message: {message}")
+  time.sleep(1)
+
+connection.close()
\ No newline at end of file
diff --git a/rogashova_ekaterina_lab_4/readme.md b/rogashova_ekaterina_lab_4/readme.md
new file mode 100644
index 0000000..a0aae9c
--- /dev/null
+++ b/rogashova_ekaterina_lab_4/readme.md
@@ -0,0 +1,49 @@
+# Лабораторная работа №4
+
+## Описание
+Задание 1 из туториала: ![task1.jpg](results/task1.jpg)
+Задание 2 из туториала: ![task2.jpg](results/task2.jpg)
+Задание 3 из туториала: ![task3.jpg](results/task3.jpg)
+
+Также были созданы файлы Consumer1, Consumer2 и Publisher для обработки событий в сфере онлайн-магазина
+
+Publisher: 
+
+• Создает обменник типа fanout с именем online_store_events.
+
+• Каждую секунду генерирует сообщения в формате JSON, описывающие различные события в магазине.
+
+• Отправляет сообщения в обменник.
+
+Consumer 1:
+
+• Создает очередь с именем order_processing_queue.
+
+• Создает привязку к обменнику online_store_events.
+
+• Принимает сообщения из очереди.
+
+• Обрабатывает сообщения, симулируя обработку заказа (использует time.sleep(2)). 
+
+• Выводит в консоль информацию о полученном сообщении.
+
+Consumer 2:
+
+• Создает очередь с именем product_recommendation_queue.
+
+• Создает привязку к обменнику online_store_events.
+
+• Принимает сообщения из очереди.
+
+• Обрабатывает сообщения мгновенно, симулируя создание рекомендаций (использует print(f"Обработка рекомендации: {message}")).
+
+• Выводит в консоль информацию о полученном сообщении.
+
+## Вывод работы 
+Для того, чтобы сделать вывод, необходимо подождать некоторое время, тогда можно будет увидеть, что количество сообщений в order_processing_queue будет больше,
+чем в product_recommendation_queue, так как во второй очереди происходит мгновенная обработка сообщений.
+Если запустить несколько Consumer-1, то количество сообщений в order_processing_queue снизится, так как несколько экземпляров первого consumer будут работать параллельно, и RabbitMQ будет распределять входящие сообщения между ними (это называется "разделение нагрузки").
+![Consumer-1.jpg](results/Consumer-1.jpg)
+![Consumer-3.jpg](results/Consumer-3.jpg)
+## Видео
+Работоспособность представлена на [видео](https://vk.com/video204968285_456240928).
\ No newline at end of file
diff --git a/rogashova_ekaterina_lab_4/results/Consumer-1.jpg b/rogashova_ekaterina_lab_4/results/Consumer-1.jpg
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index 0000000..82aee74
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diff --git a/rogashova_ekaterina_lab_4/results/Consumer-3.jpg b/rogashova_ekaterina_lab_4/results/Consumer-3.jpg
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index 0000000..b4bccd1
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diff --git a/rogashova_ekaterina_lab_4/results/task1.jpg b/rogashova_ekaterina_lab_4/results/task1.jpg
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diff --git a/rogashova_ekaterina_lab_4/results/task2.jpg b/rogashova_ekaterina_lab_4/results/task2.jpg
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diff --git a/rogashova_ekaterina_lab_4/results/task3.jpg b/rogashova_ekaterina_lab_4/results/task3.jpg
new file mode 100644
index 0000000..34ae09e
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diff --git a/rogashova_ekaterina_lab_4/tasks/1/receive.py b/rogashova_ekaterina_lab_4/tasks/1/receive.py
new file mode 100644
index 0000000..caf3912
--- /dev/null
+++ b/rogashova_ekaterina_lab_4/tasks/1/receive.py
@@ -0,0 +1,27 @@
+import pika, sys, os
+
+def main():
+    connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
+    channel = connection.channel()
+
+    channel.queue_declare(queue='hello')
+
+    def callback(ch, method, properties, body):
+        print(f" [x] Received {body}")
+
+    channel.basic_consume(queue='hello',
+                          auto_ack=True,
+                          on_message_callback=callback)
+
+    print(' [*] Waiting for messages. To exit press CTRL+C')
+    channel.start_consuming()
+
+if __name__ == '__main__':
+    try:
+        main()
+    except KeyboardInterrupt:
+        print('Interrupted')
+        try:
+            sys.exit(0)
+        except SystemExit:
+            os._exit(0)
\ No newline at end of file
diff --git a/rogashova_ekaterina_lab_4/tasks/1/send.py b/rogashova_ekaterina_lab_4/tasks/1/send.py
new file mode 100644
index 0000000..21fb9c2
--- /dev/null
+++ b/rogashova_ekaterina_lab_4/tasks/1/send.py
@@ -0,0 +1,13 @@
+import pika
+
+connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
+channel = connection.channel()
+
+channel.queue_declare(queue='hello')
+
+channel.basic_publish(exchange='',
+                      routing_key='hello',
+                      body='Hello World!')
+print(" [x] Sent 'Hello World!'")
+
+connection.close()
\ No newline at end of file
diff --git a/rogashova_ekaterina_lab_4/tasks/2/new_task.py b/rogashova_ekaterina_lab_4/tasks/2/new_task.py
new file mode 100644
index 0000000..2e05d40
--- /dev/null
+++ b/rogashova_ekaterina_lab_4/tasks/2/new_task.py
@@ -0,0 +1,19 @@
+import pika
+import sys
+
+connection = pika.BlockingConnection(
+    pika.ConnectionParameters(host='localhost'))
+channel = connection.channel()
+
+channel.queue_declare(queue='task_queue', durable=True)
+
+message = ' '.join(sys.argv[1:]) or "Hello World!"
+channel.basic_publish(
+    exchange='',
+    routing_key='task_queue',
+    body=message,
+    properties=pika.BasicProperties(
+        delivery_mode=pika.DeliveryMode.Persistent
+    ))
+print(f" [x] Sent {message}")
+connection.close()
diff --git a/rogashova_ekaterina_lab_4/tasks/2/worker.py b/rogashova_ekaterina_lab_4/tasks/2/worker.py
new file mode 100644
index 0000000..8f8ab64
--- /dev/null
+++ b/rogashova_ekaterina_lab_4/tasks/2/worker.py
@@ -0,0 +1,22 @@
+import pika
+import time
+
+connection = pika.BlockingConnection(
+    pika.ConnectionParameters(host='localhost'))
+channel = connection.channel()
+
+channel.queue_declare(queue='task_queue', durable=True)
+print(' [*] Waiting for messages. To exit press CTRL+C')
+
+
+def callback(ch, method, properties, body):
+    print(f" [x] Received {body.decode()}")
+    time.sleep(body.count(b'.'))
+    print(" [x] Done")
+    ch.basic_ack(delivery_tag=method.delivery_tag)
+
+
+channel.basic_qos(prefetch_count=1)
+channel.basic_consume(queue='task_queue', on_message_callback=callback)
+
+channel.start_consuming()
\ No newline at end of file
diff --git a/rogashova_ekaterina_lab_4/tasks/3/emit_log.py b/rogashova_ekaterina_lab_4/tasks/3/emit_log.py
new file mode 100644
index 0000000..45b6989
--- /dev/null
+++ b/rogashova_ekaterina_lab_4/tasks/3/emit_log.py
@@ -0,0 +1,13 @@
+import pika
+import sys
+
+connection = pika.BlockingConnection(
+    pika.ConnectionParameters(host='localhost'))
+channel = connection.channel()
+
+channel.exchange_declare(exchange='logs', exchange_type='fanout')
+
+message = ' '.join(sys.argv[1:]) or "info: Hello World!"
+channel.basic_publish(exchange='logs', routing_key='', body=message)
+print(f" [x] Sent {message}")
+connection.close()
\ No newline at end of file
diff --git a/rogashova_ekaterina_lab_4/tasks/3/receive_logs.py b/rogashova_ekaterina_lab_4/tasks/3/receive_logs.py
new file mode 100644
index 0000000..60d881d
--- /dev/null
+++ b/rogashova_ekaterina_lab_4/tasks/3/receive_logs.py
@@ -0,0 +1,22 @@
+import pika
+
+connection = pika.BlockingConnection(
+    pika.ConnectionParameters(host='localhost'))
+channel = connection.channel()
+
+channel.exchange_declare(exchange='logs', exchange_type='fanout')
+
+result = channel.queue_declare(queue='', exclusive=True)
+queue_name = result.method.queue
+
+channel.queue_bind(exchange='logs', queue=queue_name)
+
+print(' [*] Waiting for logs. To exit press CTRL+C')
+
+def callback(ch, method, properties, body):
+    print(f" [x] {body}")
+
+channel.basic_consume(
+    queue=queue_name, on_message_callback=callback, auto_ack=True)
+
+channel.start_consuming()
\ No newline at end of file