Due to a manufacturing error, four cans of regular soda were accidentally filled with diet soda and placed into a 12-pack. Suppose that two cans are randomly selected from the 12-pack. Complete parts (a) through (c). (a) Determine the probability that both contain diet soda. P(both diet) = (Round to four decimal places as needed.) (b) Determine the probability that both contain regular soda. P(both regular) = (Round to four decimal places as needed.) Would this be unusual? O Yes O No (c) Determine the probability that exactly one is diet and exactly one is regular. P(one diet and one regular) = (Round to four decimal places as needed.)