Question 4 ",1 Fast Auto Service provides oil and lube service for ca rs. It is known that the mean time taken for oil and lube service at this...

please help this is statistics homework and I'm not sure how to calculate the answer for this chapter homework problem...........

Question 4 “,1 Fast Auto Service provides oil and lube service for ca rs. It is known that the mean time taken for oil and lube service at this garage is 15 minutes per car and the standarddeviation is 2.4 minutes. The management wants to promote the business by guaranteeing a maximum waiting time for its customers. If a customer's car is not serviced withinthat period, the customer will receive a 50% discounton the charges. The company wants to limit this discount to at most8% of the customers. What should the maximumguaranteed waiting time be? Assume that the times taken for oil and lube service for all cars have a normal distribution. Round your answer to the nearest minute. The maximum guaranteed waiting time should be approximately I minutes. Hint eTextbook and Media Attempts: 0 of 2 used Send to Gradebook