13. The frequency table below summarizes the times in the last month that patients at the emergency room of a small-city hospital waited to receive medical attention. Walny Iima Frequency Less than In minutes AI Ieasl In bul less 11194120 minutes 5 24 AI leasl 20 bul lass hen 30 minutes 45 Alham30bullessman40 minutes 33 19 T 2 AI leasl 40 bul less man 50 minutes AI leasl 50 bul less men minutes "' \"355' 5 '3'" \"\"35 mm \"mums Which of the following represents possible values for the median and mean waiting times for the emergency room last month? (a) median = 27 minutes and mean = 24 minutes (b) median = 28 minutes and mean = 30 minutes (c) median = 31 minutes and mean = 35 minutes (d) median = 35 minutes and mean = 39 minutes (e) median = 45 minutes and mean = 46 minutes