At a local coffee shop, wait times for a cup of plain coffee are normally distributed with a mean of 90 seconds and a standard deviation of 15 seconds. a. What is the z-score of an 84-second wait time for a cup of plain coffee? Round your result to one decimal place. b. What percentile is associated with the z-score you calculated in part a? Round your answer to one decimal place. Percentile: % Interpret the percentile in a way that is specific to coffee wait times. 34.5% of wait times are 15 seconds away from 90 seconds. O 34.5% of wait times are less than 84 seconds. O 34.5% of wait times are longer than 84 seconds. O 34.5% of wait times are between 84 and 90 seconds.

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