Here is the results of lab 1 tasks.

lab1/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.ironhack</groupId>
+    <artifactId>lab1</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+</project>

lab1/src/main/java/com/ironhack/Main.java

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+package com.ironhack;
+
+//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
+// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
+public class Main {
+    public static void main(String[] args) {
+        int nums = 0;
+        int result = nums;
+        int[] myArray = {2,3,7,9};
+        int min = myArray[0];
+        int max = myArray[0];
+        int i;
+
+        for (i = 0; i < myArray.length;i++) {
+            if (myArray[i] < min) {
+                min = myArray[i];
+            }
+            if (myArray[i] > max) {
+                max = myArray[i];
+            }
+        }
+        System.out.println("minimumu " + min);
+        System.out.println("maximumu " + max);
+        int difference = max - min;
+        System.out.println("Differenceleri " + difference);
+
+        /*TASK 2
+Write a Java method that finds the smallest and second smallest elements of a
+given array and prints them to the console.
+*/
+        int [] array2 = {2,3,7,1,9};
+
+        int smallest = array2[0];
+        for (int k=0; k<array2.length;k++){
+            if (array2[k]<smallest){
+                smallest = array2[k];
+            }
+        }
+        int secondSmallest = array2[0];
+        for (int z=0;z<array2.length;z++){
+            if (array2[z]<secondSmallest && array2[z]!= smallest){
+                secondSmallest = array2[z];
+            }
+        }
+        System.out.println("smallest: " + smallest);
+        System.out.println("secondSmallest " + secondSmallest);
+
+
+
+        /*TASK 3
+Write a Java method that calculates the result of the following mathematical expression,
+where x and y are two variables that have been pre-set in your code:
+x*x + ((4*y)/5 - x)*((4*y)/5 - x)
+*/
+        int x;
+        int y;
+        //for example
+        x=5;
+        y=2;
+        int resultOfCalc = (x*y)+ ((4*y)/5 - x)*((4*y)/5 - x);
+         System.out.println("Result for calculation is " + resultOfCalc);
+    }
+}