(20) A company started to supply a complex component for various wind turbines a year ago. The components are produced on a 3 -station flow line. The processing times at the 3 stations are 0.1,1 and 0.1 hours, all including setup times, respectively. 2.1. (8) Please draw a symbolic model for the system and find the raw processing time, the critical WIP and bottleneck rate. 2.2. (12) The coefficient of variation for the processing time at the bottleneck station is 0.5 and near zero in the other two stations near zero. The expected time between interruptions for the bottleneck server is 30 minutes. The interarrival time of orders is 2 hours with coefficient of variation of 0.8 . The mean time between unexpected interruptions is 12 minutes with a coefficient of variation of 0.7 , please find the expected system cycle times. What is the expected wait time by patients at the first process