I would appreciate help in solving and understanding the following problem In a study investigating the effect of car speed on accident severity, the vehicle speed at impact was recorded for 5.000 fatal accidents. For these accidents, the mean speed was 42 mph and the standard deviation was 15 mph. A histogram revealed that the vehicle speed distribution was mound shaped and approximately symmetric. A. Approximately what percentage of the vehicle speeds were between 27 and 57 mph? B. Approximately what percentage of the vehicle speeds exceeded 57 mph