the manager of a service department at the snowmobile dealership is interested in the time spent on fixing broken snowmobiles ( service time). tablw 1 below indicates the classes of service time a snowmobile to be fixed and the number of snowmobiles in each of these classes. A) When service time is 20-29, frequency of cars is 16 B) when service time is 30-39, frequency of cars is 32 C) when service time is 40-49, frequency of cars is 20 D) when service time is 50-59, frequency of cars is 8 E) when service time is 60-69, frequency of cars is 4 * WHAT IS THE cumulative relative frequency of class 50-59? * what is the percentage of customers who will have to wait 49 minutes or less for their snowmobile to be fixed