Time for action – setting up the EnemyManager class

1. Add the setUpWaypoints() helper function to the EnemyManager class:

   private void setUpWaypoints()
   {
       List<Vector2> path0 = new List<Vector2>();
       path0.Add(new Vector2(850, 300));
       path0.Add(new Vector2(-100, 300));
       pathWaypoints.Add(path0);
       waveSpawns[0] = 0;
   
       List<Vector2> path1 = new List<Vector2>();
       path1.Add(new Vector2(-50, 225));
       path1.Add(new Vector2(850, 225));
       pathWaypoints.Add(path1);
       waveSpawns[1] = 0;
   
       List<Vector2> path2 = new List<Vector2>();
       path2.Add(new Vector2(-100, 50));
       path2.Add(new Vector2(150, 50));
       path2.Add(new Vector2(200, 75));
       path2.Add(new Vector2(200, 125));
       path2.Add(new Vector2(150, 150));
       path2.Add(new Vector2(150, 175));
       path2.Add(new Vector2(200, 200));
       path2.Add(new Vector2(600, 200));
       path2.Add(new Vector2(850, 600));
       pathWaypoints.Add(path2);
       waveSpawns[2] = 0;
   
       List<Vector2...