Consider the following event list for a FIFO single-server queue, where i is the customer's sequence number, A, is the ith customer's arrival time, T, is the customer's service start time, and S, is the customer's service time. N. A; T, Si CI A CO NO H 10 15 19 21 22 Event list for FIFO What is the average time in system (service + waiting time) for all 5 customers? O 1.6 O 2.4 O 3.4 O 4.6 O 6.0