static void Main(string[] args)
{
// TODO: Declare and initialize a CD and a DVD object.
DVD test_dvd = new DVD("super fast", 100.5, "terminator");
CD test_cd = new CD("Slow mode", 45.3, "La cucaracha");
// TODO: Call each CD and DVD method to verify that they work as expected.
test_dvd.PlayMovie();
test_cd.PlayMusic();
}