The huge market that exists for golf balls can be partially attributed to the fact that golfers lose them at an average rate of 3 per 18-hole round. Assume that the number of golf balls lost in an...

The huge market that exists for golf balls can be partially attributed to the fact that golfers lose them at an average rate of 3 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:

1. 
   
   
   
   1. No balls will be lost in an 18-hole round?
      
   
   
   2. 5 or fewer will be lost in an 18-hole round?
      
   
   
   3. 2 or fewer will be lost in a 9-hole round?
      
   
   
   4. 3 or fewer will be lost in a 36-hole round?