1)Suppose the method of a tree ring dating gave the following dates A.D. for the following: 124512451321119112951330123912501228Find a 98% confidence interval for the mean of all the tree ring dates.A.State the general formula for the interval.B.Show the plugging in of the appropriate values. C.Find the interval using your calculator. State the keystrokes.D.State the interval given in the calculator.E.Interpret the results according to the authentic situation.