Drive belt broke why???

Yesterday my car was making a lound noise like soon after the drive belt broke 1992 Mercury Grand Marquis. Anyway the belt did not look to bad to me. Now I CAN NOT GET THE BELT ON. And now one of the power steering hoses is leaking. How do i get it on i LOOK AT THE DIAGRAM STILL NO LUCK. Is there any way i can tell if the belt broke from a pully looking up or is it is the alternater, a/c etc. Most of all having problem getting it on the correct way any help or advise.