A random sample of the price of gasoline from 40 gas stations in a region gives the statistics below. Complete parts​ a) through​ c). y overbarequals​$3.59​, sequals​$0.26 ​a) Find a 95​% confidence interval for the mean price of regular gasoline in that region. (nothing comma nothing )​(Round to three decimal places as​ needed.) ​b) Find the​ 90% confidence interval for the mean. (nothing comma nothing )​(Round to three decimal places as​ needed.) ​c) If we had the same statistics from a sample of 80 ​stations, what would the​ 95% confidence interval be​ now? (nothing comma nothing )​(Round to three decimal places as​ needed.)