diff --git a/Exercise.java b/Exercise.java
index 3c092f9..2e73171 100644
--- a/Exercise.java
+++ b/Exercise.java
@@ -1,6 +1,8 @@
 public class Exercise {
 
   public static void main(String[] args) {
-    // implement exercise here
+    Queries queries = new Queries(DataProvider.getFootballers());
+    queries.getAllFootballersByBirthyear().values().stream().forEach(System.out::println);
+    // add more queries as you wish
   }
 }
diff --git a/FootballClub.java b/FootballClub.java
new file mode 100644
index 0000000..d672df3
--- /dev/null
+++ b/FootballClub.java
@@ -0,0 +1 @@
+public record FootballClub(String name, int positionInAllTimeTable, int pointsInAllTimeTable) {}
diff --git a/Footballer.java b/Footballer.java
new file mode 100644
index 0000000..f728485
--- /dev/null
+++ b/Footballer.java
@@ -0,0 +1,10 @@
+import java.time.LocalDate;
+
+public record Footballer(
+    String name,
+    Position position,
+    LocalDate birthDate,
+    int sizeInCm,
+    FootballClub footballClub,
+    int numberOfGames,
+    int numberOfGoals) {}
diff --git a/Position.java b/Position.java
new file mode 100644
index 0000000..725db90
--- /dev/null
+++ b/Position.java
@@ -0,0 +1,6 @@
+public enum Position {
+  GOALKEEPER,
+  DEFENDER,
+  MIDFIELDER,
+  STRIKER;
+}
diff --git a/Queries.java b/Queries.java
new file mode 100644
index 0000000..8ccce42
--- /dev/null
+++ b/Queries.java
@@ -0,0 +1,61 @@
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.OptionalDouble;
+import java.util.function.Function;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+
+public class Queries {
+
+  private ArrayList<Footballer> footballers;
+
+  public Queries(ArrayList<Footballer> footballers) {
+    this.footballers = footballers;
+  }
+
+  public int getTotalOfAllGoalsByMidfielders() {
+    return footballers.stream()
+        .filter(footballer -> footballer.position().equals(Position.MIDFIELDER))
+        .mapToInt(footballer -> footballer.numberOfGoals())
+        .sum();
+  }
+
+  public Optional<String> getNameOfVfLWolfsburgFootballerWithMostPlayedGames() {
+    Predicate<Footballer> isFromWolfsburg =
+        footballer -> footballer.footballClub().equals(new FootballClub("VfL Wolfsburg", 3, 1145));
+    Comparator<Footballer> sortNumberOfGoalsAscending =
+        (footballer1, footballer2) ->
+            Integer.valueOf(footballer1.numberOfGames()).compareTo(footballer2.numberOfGames());
+
+    return footballers.stream()
+        .filter(isFromWolfsburg)
+        .max(sortNumberOfGoalsAscending)
+        .map(footballer -> footballer.name());
+  }
+
+  public List<FootballClub> getNameOfAllFootballClubs() {
+    return footballers.stream().map(footballer -> footballer.footballClub()).distinct().toList();
+  }
+
+  public boolean isFootballerWithSizeInCmLT170AndNumbreOfGoalsBT0() {
+    return footballers.stream()
+        .anyMatch(footballer -> footballer.sizeInCm() < 170 && footballer.numberOfGoals() > 0);
+  }
+
+  public Map<Integer, List<Footballer>> getAllFootballersByBirthyear() {
+    Function<Footballer, Integer> birthYear = footballer -> footballer.birthDate().getYear();
+    return footballers.stream().collect(Collectors.groupingBy(birthYear));
+  }
+
+  public OptionalDouble getAverageNumberOfPointsFromAllBundesligaFootballClubs() {
+    return footballers.stream()
+        .map(footballer -> footballer.footballClub())
+        .distinct()
+        .filter(footballClub -> footballClub.positionInAllTimeTable() != -1)
+        .mapToInt(footballClub -> footballClub.pointsInAllTimeTable())
+        .average();
+  }
+}