The Cedar Rapids Gazette (November 20, 1999) reported the following information on compliance with child restraint laws for cities in Iowa:
a. Use the information provided to estimate the following probabilities:
i. The probability that a randomly selected child is properly restrained given that the child is observed in Dubuque.
ii. The probability that a randomly selected child is properly restrained given that the child is observed in a city that has "Cedar" in its name.
b. Suppose that you are observing children in the Iowa City area. Use a tree diagram to illustrate the possible outcomes of an observation that considers both the location of the observation (city or interstate) and whether the child observed was properly restrained.