A survey of 225 gas stations in the New Haven area revealed the following data of the price per gallon of regular gasoline. Mean= $2.82, s= .12. Construct a confidence interval using:(round to nearest "tenth" of a cent i.e. $3.015): a) .85 level of confidence. b) .96 level of confidence. c) .99 level of confidence, but decrease the "n" to 25