static void Main(string[] args)
{
// TODO: Declare and initialize a CD and a DVD object.
CD g;
g = new CD(205, "CD");
g.Spin();
g.MakeSound();
g.Encode();
DVD f;
f = new DVD(600, "DVD");
f.Spin();
f.MakeSound();
f.Encode();
// TODO: Call each CD and DVD method to verify that they work as expected.
}