Please help with 9.2

The takt time calculated for 9.1 is 3.61

EXERCISES 9.1 The time between patient arrivals to the blood-drawing unit of a medical lab averages 2 minutes. The lab is staffed with two nurses who actually draw the patients' blood. The nurses work from 9:00 A.M. to 5:30 P.M. and get two 10-minute breaks and a half hour for lunch. What is the takt time for drawing patient blood? 2 Referring to Exercise 1, assume that additional analysis was performed and it was determined that an average of 255 patients (with a standard deviation of 30) requiring blood work come to the lab each day. It was further determined that the duration of the nurses' breaks ranged from 9 to 13.5 minutes, with all times in the range equally likely, and that the time taken for lunch ranged from 28 minutes to 34 minutes, again with all times in the range equally likely Using Crystal Ball or another simulation package, develop a distribution for the takt time, assuming that the number of patients that arrive on a given day is normally distributed. What are the managerial implications of your analysis