Eh; time requied for an automotive center to complete an oi change service on an automobile approximately follows a normal dishibulion. with a mean of 15 ninrtes and a standard derision d . minutes (a) The automotive center guarantees customers that the service will take no longer than 20 minutesr If it does take longer, the customer wil receive the service for half-price. What permit of ' customers receive the service tor half~price? (b) If the automotive center does not want to give the discount to more than 3% of its customers, how long should it make the guaranteed time limit? I 3 Click the icon to View a table of areas under the normal curve. (a) The percent of customers that receive the service for halfprice is 3% (Round to two decimal places as needed} Get more help - v an example