A telephone company is providing a list of seven-digit telephone numbers where the first three digits begin with 234 and the last four digits are randomly selected numbers from zero to 9 (i.e., 234-0000 to 234-9999).

a) If the numbers are selected with equal probability, what distribution would be used to model the selection?

b) If the telco company wants to select 100 telephone numbers from the list, what is the probability that the randomly selected telephone number will be in the selection?

c) The telephone numbers with the last four digits that are above 9900 were booked by a company for its staff. What is the probability that a randomly selected number will be one of these?