Misc: Which musical includes the song "if i were a rich man"?

Questions

which horse won the 1999 preakness stakes?

which horse won the 1999 belmont stakes?

which horse fell heavily in the 1999 belmont stakes and terminated its triple crown dreams, and would never race again?

who is the only person in history to acheive a 'gold slam', i.e. the four grand slams and the olympic gold all in one year?

who was nicknamed 'muscles'?