diff --git a/src/Employee.java b/src/Employee.java
new file mode 100644
index 0000000..f78d9cf
--- /dev/null
+++ b/src/Employee.java
@@ -0,0 +1,21 @@
+public class Employee {
+    private String name;
+    private double salary;
+
+    public Employee(String name, double salary) {
+        this.name = name;
+        this.salary = salary;
+    }
+
+    // Getters y Setters
+    public String getName() { return name; }
+    public void setName(String name) { this.name = name; }
+
+    public double getSalary() { return salary; }
+    public void setSalary(double salary) { this.salary = salary; }
+
+    @Override
+    public String toString() {
+        return "Employee{name='" + name + "', salary=" + salary + "}";
+    }
+}
\ No newline at end of file
diff --git a/src/Intern.java b/src/Intern.java
new file mode 100644
index 0000000..1da7bed
--- /dev/null
+++ b/src/Intern.java
@@ -0,0 +1,24 @@
+public class Intern extends Employee {
+    // Constante: el límite de salario para pasantes
+    private static final double MAX_SALARY = 20000;
+
+    public Intern(String name, double salary) {
+        // Validamos en el constructor usando una función privada
+        super(name, validateSalary(salary));
+    }
+
+    @Override
+    public void setSalary(double salary) {
+        // Validamos también al intentar actualizar el salario
+        super.setSalary(validateSalary(salary));
+    }
+
+    private static double validateSalary(double salary) {
+        return Math.min(salary, MAX_SALARY);
+    }
+
+    @Override
+    public String toString() {
+        return "Intern (Max 20k){name='" + getName() + "', salary=" + getSalary() + "}";
+    }
+}
\ No newline at end of file
diff --git a/src/Main.java b/src/Main.java
new file mode 100644
index 0000000..52527ed
--- /dev/null
+++ b/src/Main.java
@@ -0,0 +1,57 @@
+public class Main {
+    public static void main(String[] args) {
+        // --- PRUEBA TAREA 1 & 2 ---
+        int[] myNumbers = {15, 2, 8, 25, 1, 30};
+
+        System.out.println("Diferencia Max-Min: " + calculateDifference(myNumbers));
+        findSmallestElements(myNumbers);
+
+        System.out.println("\n--- TAREA 5: LISTA DE 10 EMPLEADOS ---");
+
+        // Creamos un array para almacenar 10 objetos Employee o Intern
+        Employee[] staff = new Employee[10];
+
+        for (int i = 0; i < 10; i++) {
+            if (i % 2 == 0) {
+                staff[i] = new Employee("Staff_" + i, 35000 + (i * 1000));
+            } else {
+                // Intentamos ponerle 25000, pero el código lo bajará a 20000 automáticamente
+                staff[i] = new Intern("Intern_" + i, 25000);
+            }
+            // Imprimimos todas las propiedades usando el toString()
+            System.out.println(staff[i]);
+        }
+    }
+
+    // TAREA 1: Algoritmo de diferencia
+    public static int calculateDifference(int[] nums) {
+        if (nums.length < 1) return 0;
+        int min = nums[0];
+        int max = nums[0];
+
+        for (int n : nums) {
+            if (n < min) min = n;
+            if (n > max) max = n;
+        }
+        return max - min;
+    }
+
+    // TAREA 2: Los dos más pequeños
+    public static void findSmallestElements(int[] nums) {
+        if (nums.length < 2) return;
+
+        int smallest = Integer.MAX_VALUE;
+        int secondSmallest = Integer.MAX_VALUE;
+
+        for (int n : nums) {
+            if (n < smallest) {
+                secondSmallest = smallest;
+                smallest = n;
+            } else if (n < secondSmallest && n != smallest) {
+                secondSmallest = n;
+            }
+        }
+        System.out.println("El menor es: " + smallest);
+        System.out.println("El segundo menor es: " + secondSmallest);
+    }
+}
\ No newline at end of file
diff --git a/src/Task2.java b/src/Task2.java
new file mode 100644
index 0000000..70084cc
--- /dev/null
+++ b/src/Task2.java
@@ -0,0 +1,23 @@
+public class ArrayMethods {
+
+    public static void findSmallestTwo(int[] arr) {
+        // Inicializamos con el valor máximo posible para que cualquier número del array sea menor
+        int smallest = Integer.MAX_VALUE;
+        int secondSmallest = Integer.MAX_VALUE;
+
+        for (int i = 0; i < arr.length; i++) {
+            if (arr[i] < smallest) {
+                // El que era el más pequeño pasa a ser el segundo
+                secondSmallest = smallest;
+                // El actual se convierte en el más pequeño
+                smallest = arr[i];
+            } else if (arr[i] < secondSmallest && arr[i] != smallest) {
+                // Si es mayor que el pequeño pero menor que el segundo, actualizamos el segundo
+                secondSmallest = arr[i];
+            }
+        }
+
+        System.out.println("Smallest element: " + smallest);
+        System.out.println("Second smallest element: " + secondSmallest);
+    }
+}
\ No newline at end of file
diff --git a/src/Task3.java b/src/Task3.java
new file mode 100644
index 0000000..9f73ea5
--- /dev/null
+++ b/src/Task3.java
@@ -0,0 +1,22 @@
+public class Employee {
+    private String name;
+    private String id;
+    private double salary;
+
+    // Constructor
+    public Employee(String name, String id, double salary) {
+        this.name = name;
+        this.id = id;
+        this.salary = salary;
+    }
+
+    // Getters y Setters
+    public String getName() { return name; }
+    public void setName(String name) { this.name = name; }
+
+    public String getId() { return id; }
+    public void setId(String id) { this.id = id; }
+
+    public double getSalary() { return salary; }
+    public void setSalary(double salary) { this.salary = salary; }
+}
\ No newline at end of file
diff --git a/src/Task4.java b/src/Task4.java
new file mode 100644
index 0000000..6f65800
--- /dev/null
+++ b/src/Task4.java
@@ -0,0 +1,20 @@
+public class Intern extends Employee {
+    // Definimos el límite como una constante estática y final
+    private static final double MAX_SALARY_LIMIT = 20000.0;
+
+    public Intern(String name, String id, double salary) {
+        // Usamos super() para llamar al constructor de Employee
+        // Si el salario es mayor al límite, lo bajamos automáticamente a 20000
+        super(name, id, salary > MAX_SALARY_LIMIT ? MAX_SALARY_LIMIT : salary);
+    }
+
+    @Override
+    public void setSalary(double salary) {
+        // Volvemos a validar por si intentan cambiar el salario después de creado
+        if (salary > MAX_SALARY_LIMIT) {
+            super.setSalary(MAX_SALARY_LIMIT);
+        } else {
+            super.setSalary(salary);
+        }
+    }
+}
\ No newline at end of file