A supervisor has asked her team to improve its average talk Time Performance the team's average talk time is 13 minutes per call in the average for the call center is 8 minutes per call the following week the supervisor reports the following results John's went from 15 minutes to 16.5 minutes George's went to from 15 minutes to 14 minutes Paul's went from 12 minutes to nine minutes and Ringoes went from 12 minutes to 2 minutes whose performance improve the most While most likely giving the best service to customers?