The quality control manager of Marilyn's Cookies is inspecting a batch of chocolate-chip cookies that has just been baked. If the production process is in control, the mean number of chip parts per cookie is 6.0. What is the probability that in any particular cookie being inspected
a. Fewer than five chip parts will be found?
b. Exactly five chip parts will be found?
c. Five or more chip parts will be found?
d. Either four or five chip parts will be found?