A disk jockey is hired to play records at a wedding party where the guests do not want to hear the same song played more than once. The disk jockey has a music collection with 11 difffferent songs in each of 4 difffferent genres: jazz, dance, rock, and pop. In how many ways can the disk jockey pick

four songs to play (the order is not relevant) so that

(a) all songs are from the same genre?

(b) all songs are from difffferent genres?

(c) the songs are from exactly three genres?

(d) the songs are from exactly two genres?