For Exercises 5.1 and 5.2, see page 245; for 5.3 to 5.6, see page 246; for 5.7 to 5.9, see page 250; for 5.10 and 5.11, see page 253; for 5.12 and 5.13, see pages 254–255; for 5.14, see page 256; and for 5.15 to 5.17, see page 260.
5.40 ATM customers.
Refer to Example 5.17. Use the Poisson model to compute the probability that four or fewer customers will use the ATM machine during any given hour between 9 A.M. and 5 P.M.