The time taken for guests to check out at a hotel front desk was measured over the course of several weeks. The management believes that the target time for checking out guests should be between 1.5 and 4.5 minutes with a target of 3 minutes. The data gathered for the actual process had a mean time of 3.5 minutes with a standard deviation of 0.21 minutes. The process capability index will be:Select one:a. more than 2 but less than or equal to 3.b. more than 3 but less than or equal to 1.c. more than 1.d. less than or equal to 2.
