5. Suppose that it takes a nurse on average 13.7 minutes to complete a specic task and that completion time is normally distributed with a standard deviation of 3.4 minutes. a. What proportion of nurses complete the task between 15.2 and 17.7 minutes? b. What proportion of nurses complete the task in less than 8 minutes and 24 seconds? 0. What completion time is the 73rd percentile? d If 30 nurses were randomly selected from this population, what is the probability that the sample mean time will be greater than 14 minutes and 12 seconds