During а typicаl Mаy in St. Lоuis, it rains оnce every 2.6 days. Using the expоnential distribution, calculate the probability that no rain ralls during the first week (7 days) in the month of May. (Hint: You can also think of this as the probability that the first rainy day happens after a week.) You may any of use these values, if you think it would be helpful: