13. four girls run a one-mile race. one runner's time is 8 minutes and 45 seconds,another runner's time is 8 minutes and 57 seconds, and a third runner's time is 9 minuteand 23 seconds. if the average time for the four girls was 8 minutes and 30 seconds, whatwas the fourth runner's time?c)a.6 minutes, 55 seconds7 minutes, 15 seconds7 minutes, 35 second8 minutes, 30 seconds