Immutable Vector using Information Expert Pattern

Vector.java

class Vector {
  private final int x, y, z;
  public Vector(int x, int y, int z) {
    this.x = x;
    this.y = y;
    this.z = z;
  }
  
  public Vector crossProduct(Vector other) {
      // Do your math here
      // Return a NEW immutable Vector
      return new Vector(newX, newY, newZ);
  }
}