diff --git a/lr11/task_1/e2.java b/lr11/task_1/e2.java
new file mode 100644
index 0000000..2e687ad
--- /dev/null
+++ b/lr11/task_1/e2.java
@@ -0,0 +1,24 @@
+package lr11.task_1;
+
+import java.util.Arrays;
+
+public class e2 {
+    public static int[] getCommonElements(int[] nums1, int[] nums2) {
+        return Arrays.stream(nums1)
+                .filter(num -> Arrays.stream(nums2).anyMatch(n -> n == num))
+                .distinct()
+                .toArray();
+    }
+
+    public static void main(String[] args) {
+        int[] array1 = { 1, 2, 3, 4, 5 };
+        int[] array2 = { 3, 4, 5, 6, 7 };
+
+        int[] resultArray = getCommonElements(array1, array2);
+
+        System.out.print("Общие элементы: ");
+        for (int num : resultArray) {
+            System.out.print(num + " ");
+        }
+    }
+}
diff --git a/lr11/task_1/e3.java b/lr11/task_1/e3.java
new file mode 100644
index 0000000..ce9afd0
--- /dev/null
+++ b/lr11/task_1/e3.java
@@ -0,0 +1,21 @@
+package lr11.task_1;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class e3 {
+    public static List<String> getCapitalizedStrings(List<String> strings) {
+        return strings.stream()
+                .filter(s -> Character.isUpperCase(s.charAt(0)))
+                .collect(Collectors.toList());
+    }
+
+    public static void main(String[] args) {
+        List<String> stringList = List.of("aaaAASd", "ASDASdsdasd", "qwedGSD", "SDFSD", "oiy", "SADjk", "Pyg");
+
+        List<String> result = getCapitalizedStrings(stringList);
+
+        System.out.println("Строки, начинающиеся с большой буквы:");
+        result.forEach(System.out::println);
+    }
+}
diff --git a/lr11/task_1/e4.java b/lr11/task_1/e4.java
new file mode 100644
index 0000000..442db54
--- /dev/null
+++ b/lr11/task_1/e4.java
@@ -0,0 +1,21 @@
+package lr11.task_1;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class e4 {
+    public static List<Integer> getSquares(List<Integer> numbers) {
+        return numbers.stream()
+                .map(n -> n * n)
+                .collect(Collectors.toList());
+    }
+
+    public static void main(String[] args) {
+        List<Integer> numbers = List.of(1, 2, 3, 4, 5, 10);
+
+        List<Integer> squares = getSquares(numbers);
+
+        System.out.println("Квадраты чисел:");
+        squares.forEach(System.out::println);
+    }
+}