4.Diabetes Among adults in the United States, 11.5% have diabetes (based on data from the National Center for Health Statistics).

a. Find the probability that a randomly selected adult does not have diabetes.

b. Find the probability that two randomly selected adults both have diabetes.

c. Find the probability that among three randomly selected adults, at least one has diabetes.

d. For groups of 40 randomly selected adults, find the mean and standard deviation for the numbers of adults having diabetes. Are these results statistics or parameters?

e. If 40 adults are randomly selected and 10 of them have diabetes, is 10 a result that is significantly low or significantly high? Why?