The huge market that exists for golf balls can be partially attributed to the fact that golfers lose them at an average rate of 4 per 18-hole round. Assume that the number of golf balls lost in an 18-hole round is distributed as a Poisson random variable. What is the probability that:
No balls will be lost in an 18-hole round?
5 or fewer will be lost in an 18-hole round?
2 or fewer will be lost in a 9-hole round?
3 or fewer will be lost in a 36-hole round?