9. (7-Eleven Japan). is LESS compatible with 7-Eleven Japan's competitive strategy. A. Low cost B. Availability C. Convenience D. Variety 10. (Single-Server Queues 1)* Below are arrival and service times of four single-server queues. (Hint: Mean arrrival time of 4 and mean service time of 3 are the same across all the queues.) (Queue W) Customer: 7 8 Mean 1 2 3 4 3 3 4 3 4 5 15 4 2 4 2 1 (Queue X) (Queue Y) (Queue Z) Arrival times (hrs): Service times (hrs): Customer: Arrival times (hrs): Service times (hrs): A. Queue W B. Queue X C. Queue Y D. Queue Z 1 133 (*Discuss briefly why.) 3 3 Customer: Arrival times (hrs): Service times (hrs): 3 143 1 234 2 141 4 4 7 274 4 4 2 2 4 Customer: Arrival times (hrs): Service times (hrs): 1 5 4 1 2 275 34 7 334 has the SMALLEST average flow time (W). 4322 334 4522 5 6 5 5 5 452 554 5 5 4 5 5144 2 4 653 3 5 1 2 4 623 625 7 5 1 2 742 24 5 742 7 8 Mean 6 3 2 2 742 4 3 8 Mean 5 2 4 4 3 4 3 Z 8 Mean 6 2 1 3