Mean () = 8.5 minutes Standard deviation () = 2.2 minutes First, calculate the z-score corresponding to 5 minutes using the formula: z = (X - ) / Where X = 5 minutes, = 8.5 minutes, and = 2.2 minutes. After calculating the z-score, we need to find the area under the standard normal curve that corresponds to the time being longer than 5 minutes. To find this, you can use a standard normal distribution table or a calculator to look up the probability that corresponds to the z-score you obtained. Remember to round your final probability to four decimal places