1. Worldwide golf ball sales total more than $1 billion annually. One reason for such a large number of golf ball purchases is that golfers lose them at a rate of 4.5 per 18-hole round ("Snapshots," usatoday.com, January 29, 2004). What is the probability that
   1. Zero balls will be lost in an 18-hole round?
   2. Five or less balls will be lost in an 18-hole round?
   3. Six or more balls will be lost in an 18-hole round?