Time for action – the ExplosionManager class

1. Add a new class called "ExplosionManager" to the Asteroid Belt Assault project.

2. Add the standard using directives to the class file:

   using Microsoft.Xna.Framework;
   using Microsoft.Xna.Framework.Graphics;

3. Add declarations to the ExplosionManager class:

   private Texture2D texture;
   private List<Rectangle> pieceRectangles = new List<Rectangle>();
   private Rectangle pointRectangle;
   
   private int minPieceCount = 3;
   private int maxPieceCount = 6;
   private int minPointCount = 20;
   private int maxPointCount = 30;
   
   private int durationCount = 90;
   private float explosionMaxSpeed = 30f;
   
   private float pieceSpeedScale = 6f;
   private int pointSpeedMin = 15;
   private int pointSpeedMax = 30;
   
   private Color initialColor = new Color(1.0f, 0.3f, 0f) * 0.5f;
   private Color finalColor = new Color(0f, 0f, 0f, 0f);
   
   Random rand = new Random();
   
   private List<Particle> ExplosionParticles = new List<Particle>();

4. Add a constructor to the ExplosionManager class...