5.55 A true coincidence of emergency E-Comm, British Columbia’s emergency communications center, provides communication services and support systems to two million residents of southwest British Columbia, Canada. On any given day, the probability a randomly selected resident decides to call E-Comm is 1.37/1000.

a. Assuming calls are made independently, find the probability that they all decide to call tomorrow.

b. Is the assumption of independence made in part a realistic? Explain.