how to play songs sequencial and shuffeled in iphone sdk

how to play songs sequencial and shuffeled in iphone sdk

I am using AVAudioPlayer to play songs. I have an array of MPMediaItem. I
want sequential and shuffled on button click.
My code is:
AVAudioPlayer *player2;
MPMediaItem *item = [arrAnand objectAtIndex:i];
NSURL *url = [item valueForProperty:MPMediaItemPropertyAssetURL];
[player2 release];
player2 = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
[player2 play];
please help.