Health Care for Dogs The table shows the results of a survey in which 90 dog owners were asked how much they had spent in the last year for their dog’s health care, and whether their dogs were purebred or mixed breeds.

(a) Find the probability that $100 or more was spent on a randomly selected dog’s health care in the last year.

(b) Given that a randomly selected dog owner spent less than $100, find the probability that the dog was a mixed breed.

(c) Find the probability that a randomly selected dog owner spent $100 or more on health care and the dog was a mixed breed.

(d) Are the events “spending $100 or more on health care” and “having a mixed breed dog” independent or dependent? Explain.