A researcher is studying a particular process and has identified the following times, in minutes, between consecutive occurrences: 1.8, 4.3, 2.3, 2.1, 5.6, 1.5, 4.5, 1.8, 2.4, 2.6, 3.2, 3.5, 1.6, 2.1, and 1.9. Given this information, what would be the researcher’s best estimate for the mean of the exponential distribution? What would be her best estimate for the mean of the corresponding Poisson distribution?