White boxers are dogs that have a genetic disposition for going deaf within the first year after they are born. Suppose a litter of nine white boxer puppies contained two dogs that would eventually experience deafness. A family randomly selected two puppies from this litter to take home as family pets. Determine the following probabilities:

a. None of the two puppies selected will experience deafness.

b. One of the two puppies selected will experience deafness.

c. Both puppies selected will experience deafness.

d. Calculate the mean and standard deviation of this distribution.

e. Verify these results with Excel.