Policies Current Attempt in Progress During the dry month of August, one U. S. city has measurable rain on average only 4 days per month. Assume all months have 30 days. *(Round your answers to 1 decimal place.) **(Round the intermediate values to 4 decimal places. Round your answer to 4 decimal places.) (a) If the arrival of rainy days is Poisson distributed in this city during the month of August, what is the average number of days that will pass between measurable rain? * (b) What is the standard deviation? * (c) What is the probability during this month that there will be a period of less than 3 days between rain? **