Based on a study of acid rain, the National Acid Precipitation Assessment Program (NAPAP) estimates the probability at .14 of an Adirondack lake being acidic. Given that the Adirondack lake is acidic, the probability that the lake comes naturally by its acidity is .25 (Science News, Sept. 15, 1990). Use this information to find the probability that an Adirondack lake is naturally acidic.