The following tables gives a series of times to repair (man-hours) obtained for a diesel generator. 11.6 7.9 27.7 17.8 8.9 22.5 3.3 33.3 75.3 9.4 28.5 5.4 10.3 1.1 7.8 41.9 13.3 5.3 Estimate the MTTR. Estimate the repair rate and its 90% confidence interval assuming that the data is exponentially distributed.