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4. Given the following 25 sample observations: 5.3, 6.1, 6.7, 6.8, 6.9, 7.2, 7.6, 7.9, 8.1, 8.9, 9.0, 9.2, 9.4, 9.7, 10.1, 10.4, 10.6, 10.8, 11.3, 11.4, 12.0, 12.1, 12.3, 12.5, 13.2 And let Y1, Y2, . . . , Y'n be the order statistics for this sample A) The interval (Yg, Y16 ) could serve as distribution- free estimate of the median, m, of the population. Find the confidence coefficient of this interval. (6 points) B) The interval (Y3, Y10) could serve as the confidence interval for 7.25 . Determine this confidence interval and, using Table II in Appendix B of the textbook, determine the confidence coefficient of this interval. (6 points)