Customers arrive at a hair salon according to a Poisson process with an average of 16 customers per hour. Which of the following is most likely true, based on this information:
a. The hair salon serves customers on a walk-in basis (rather than by appointment times)
b. If 10 customers arrive in the first hour, it is likely that 22 customers will arrive in the next hour.
c. If the salon can serve an average of 20 customers per hour, then it will be rare that a customer has to wait for a haircut.
d. All of the above are most likely true.