Customer interarrival times at a store are exponentially distributed with rate 8 customers per hour. Customers are served by a single customer service representative (CSR), with an average service time of 5 minutes. Service times are also exponentially distributed. Which of the following statements are true? 0 The average time spent waiting for the CSR is 15 minutes. 0 The store is busy (has customers) 33% of the time Q The probability of having one or more customer in the store is 0.222. 0 None of the answers are correct. Q The average number of customers in the store is 2.0